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Stjärnorp Castle Ruins

Where architecture meets restoration
Architecture, Cultural Heritage
Building Preservation & Restoration, Culture, Heritage Expertise, Renovation & Transformation
Client: Private
Years of Construction: 2014–2022
General Contractor: Miljöbyggarna Entreprenad i Linköping
Developer: Slottstornet AB
Building Antiquarian and Conservator: Tyréns Sverige AB
Photographer: Felix Gerlach

Stjärnorp Castle Ruins is not only an important cultural heritage site but also a beautiful example of how contemporary architecture can enhance and highlight historical buildings. Led by Erik Wikerstål from Tengbom as the chief architect, the project has been praised for its sensitive balance between preservation and renewal.

Since 1789, Stjärnorp Castle Ruins, located just north of Linköping, stood unprotected following a devastating fire. Through extensive restoration and modernization, it has been safeguarded against further decay and prepared for future generations. Today, the ruins play a significant role in the cultural and tourism landscape of Östergötland.

Award-winning craftsmanship

The restoration of Stjärnorp Castle Ruins has received widespread recognition, earning the Östergötland Architecture Prize in 2023. The jury commended it for “exploring the boundary between restoration and architecture and how we approach our cultural heritage.” Indeed, the restoration has been characterized by exceptional craftsmanship, with every detail executed with great care and respect for history.

Protective roof and elegant interiors

The ruins have been fitted with a discreetly integrated roof that shields the historic walls without impacting the exterior aesthetics. Inside, visitors are greeted by an elegant interior where modern materials such as wood, corten steel, and glass emphasize the original architectural features.

The large window openings now feature individually designed glass panels. Each panel is precisely tailored to fit the uneven shapes of the walls. The balance between history and modernity is both striking and subtle. This is evident in the newly added spiral staircase in the tower and the carefully crafted corten steel details.

“We aimed to create something that feels contemporary while rooted in the ruin’s history. The goal was for the old and the new to enhance one another, and I’m very pleased with the result,” explains Wikerstål.

Good architecture makes cultural heritage accessible

The restoration of Stjärnorp Castle Ruins shows how architecture can make cultural sites more accessible. Careful interventions have given the ruins a new function as a destination. More visitors are drawn to the area, while the project demonstrates sustainable restoration in practice.

“We hope that Stjärnorp Castle Ruins will become a place where people can meet and experience both the past and present in a unique way,” Wikerstål concludes. “By securing the ruins for the future, we ensure that coming generations can share in our collective cultural heritage.”

Contact person

Erik Wikerstål

Architect
+46 42 19 48 56

Bergius Botanic Garden

A chlorophyll-filled assignment
Cultural Heritage, Landscape
Accessibility, Culture, Heritage Expertise, Parks, Play & Public Spaces, Renovation & Transformation
Client:
Year: 2019 -
Area: 60 hectare
Assignment type: General consultant assignment
Builder and partners: Statens Fastighetsverk
Photography: Felix Gerlach

A plant museum. That’s one way to describe Stockholm’s Bergius Botanic Garden, where Katarina Enekvist at Tengbom is in-house architect on behalf of the National Property Board of Sweden. Here, you can visit the giant Victoria water lily, learn about everything from Nordic to tropical plants, or simply give your eyes a momentary break from the asphalt.

The Italian terrace gives space to Mediterranean flora.
View of Brunnsviken from the Italian terrace, one of the garden’s most important vantage points.

Science, botany and relaxation. The beautiful scenery of Bergius Botanic Garden is located near Brunnsviken beach in Stockholm. Visitors can discover plants from around the world: fruit and berry orchards, as well as plant taxonomy areas that show how the plants are related.

In-house architect who puts valuable environments to use

Katarina Enekvist, Restoration Architect at Tengbom, has been an in-house architect for Bergius Botanic Garden since 2019. She has many years of experience leading complex assignments in environments of cultural-historic value. As an in-house architect, it is not enough simply to be skilled in design, or to have knowledge of cultural history. It is also important to balance the historic environment with today’s demands.

Since the year 1900, the Victoria House has vaulted its glass dome over an imaginative tropical world.

Preserve and improve with subtlety

The world’s largest water lily comes from the Amazon but now also has a home in the pool in the Victoria House.

The assignment of in-house architect entails long-term responsibility. And a great deal has already happened since 2019. The team has developed the old Utsiktstornet lookout tower to bring the authentic nineteenth-century environment to life. At Victoria House, they have reviewed the construction and carried out maintenance on the glass. They will restore the garden director’s overgrown garden by the Bleket building. Workers have made difficult-to-access areas of the garden accessible by installing new, specially made iron railings and restoring the stairs and walkways. The team has created a project plan for Naturens Hus in Finnstugan, an educational space for schools and kids. Designers will clarify Bergius Botanic Garden’s various entryways with a new design, and sketches are in the works.

Builders constructed the old orangery in 1926 for the garden’s tropical plants. Today, it houses a popular restaurant.

Maintenance of the grounds and wooden buildings

In addition, working in collaboration with tradespeople and painting conservators, Katarina Enekvist has carried out antiquarian reviews and consultation on the restoration and maintenance of all wooden buildings at Bergius Botanic Garden. This work has resulted in an important knowledge base, including a care program for the grounds and buildings.

“The garden should be a place for everyone, with a connection to both the past and the present. I look forward to continuing to contribute to developing this place,” says Katarina Enekvist.

Bergius Botanic Garden and Brunnsviken seen from above.
Bergius Botanic Garden, the Stockholm Botanical Garden and the Royal National City Park.

Contact person

Mark Humphreys

Practice Director Stockholm
+46 8 412 53 43

Östermalm Market Hall and Hotel

Updated for the future
Östermalm Market Hall
Architecture, Cultural Heritage
Building Preservation & Restoration, Culture, Heritage Expertise, Hotels & Meetings, Renovation & Transformation, Restaurants, Retail
Client: Stockholms Stad
Location: Östermalm, Stockholm
Assignment years: 2021-2021
BTA: Market Hall 6770 sqm and Hotel 4800 sqm
Photographer: Åke E:son Lindman and Lasse Olsson
Collaborators: Ljusrum, Nyréns, AIX, Stockholms Målerikonservering, BK Beräkningskonsulter

With the renovation of Östermalm Market Hall, Tengbom has preserved a part of the city’s history while creating a new way to experience this historic culinary destination. The market hall has undergone the most comprehensive renovation in 130 years, and together with the new market hall hotel, this cultural legacy is ready to welcome visitors for yet another century to come.

Östermalm Market Hall
The large, curved windows and original entrances were renovated and accentuated with nighttime lighting. Photo: Lasse Olsson

After a little over a century in operation, Östermalm Market Hall was in great need of renovation. Decades of sporadic updates had resulted in a space that was no longer particularly inviting.

Our task: update, accentuate and improve

Restoring the market hall to its original luster involved significant challenges. We looked back in time to put the venue’s history to use, but the building also needed to meet modern requirements, and new additions should enhance the visitor experience.

Östermalm Market Hall
Restaurants along the building facades in combination with longer opening hours and outdoor seating areas contribute to a thriving outdoor setting. Photo: Åke E:son Lindman

We had to review the building’s technology and consider the complex logistics that take place in and around the hall. Adaptations for accessibility, replacing essentially all technology, and reinforcing the cultural-historic and antiquarian values of the building topped the agenda. Simply put: we wanted to elevate the user experience without corrupting any part of the building.

Respectful adaptation for the future

We have taken a comprehensive approach with great care for the character and details of the building, from technical functions and structural initiatives to restoring the original decoration. The original star-shaped floor plan has been restored to benefit retail and create clearer walkways. Additional features have been added to create new experiences, such as long balconies with seating for restaurant guests. Greater accessibility requirements contribute to a better experience for everyone, with elevators and additional toilets.

Östermalm Market Hall
The original color scheme and decorative details have been restored. Photo: Åke E:son Lindman

New additions have a clear contemporary look that is quieter than the bold and colorful cultural-historic environment. In other cases, the choice was to emphasize and enhance the original appearance of the market hall. Paint conservators have carefully scraped away layer after layer of paint to reveal a picture of the building’s history.

Östermalm Market Hall
The original wood construction of the market hall has been renovated and adapted with low paneling and marble counters with integrated refrigerators and display areas. Photo: Åke E:son Lindman

Today, visitors encounter a more vibrant space, but in the same colors as before. Light also streams through the gable windows once more. The windows had been painted over at one point, but have now been replaced with new windows and an innovative jalousie system developed from boating technology to protect goods from direct sunlight.

Improved flows and new experiences

Today, visitors are met with a uniform and harmonious experience, a market hall that is now inclusive, adapted for accessibility and sustainable. Improved flows, smarter entryway solutions and a new waste and recycling system that reduces the number of truck transports to a fifth of what it was are just some of the elements that make Östermalm Market Hall an ultramodern meeting place. Restaurants along the building’s facades combined with longer opening hours contribute to a bustling environment outside, with greater focus on contemporary needs and behaviors, such as socializing and being seen.

The hotel – a new way to experience this historic culinary destination

A new hotel has opened that is connected to the market hall. Through parametric design and innovative architecture, Tengbom has helped create an extraordinary hotel experience. An old industrial candy factory from 1910 and an Art Nouveau residential building from 1888 have been transformed into a chic hotel. It was a tricky task to chisel a hotel out of buildings in different styles and from different eras. The historic character of the buildings had to be respected, and at the same time, we needed to unite the structures and redesign the floor plan for compatibility as a hotel. To achieve functional flows on each floor, a modern addition in handmade brick was added to the existing buildings. Together, the buildings circle a courtyard.

Östermalm Market Hall
Together, the modern addition and the original buildings circle a courtyard and create a new meeting place in the city. Photo: Åke E:son Lindman

With the market hall hotel, a new sense of flow and energy have been established on the block.

The addition in handmade brick, perforated with sound absorption underneath to create a comfortable sound environment in the hotel courtyard. Photo: Åke E:son Lindman

A glass roof in collaboration with technology and the sky

We designed the courtyard as a year-round meeting place to ensure both function and enjoyment. To achieve this, we covered the space with a specially designed glass roof. The elegant, undulating shape makes the roof feel like an extension of the sky rather than a glass cover. Placing a glass roof over three buildings with eaves at different heights posed a unique challenge. We also aimed to retain the feeling of being outdoors while preserving the neighbors’ view and daylight. To solve this, we used parametric design—an algorithmic approach that streamlines the construction of complex shapes. This method allowed us to maximize the glass surface, minimize structural elements, and create a slender roof with an open feel.

With minimal structural elements, the undulating glass roof elegantly arches across the three different buildings with eaves at dissimilar heights. Photo: Åke E:son Lindman

Sound – a crucial component

In a large, glassed-in courtyard, acoustics can pose an obstacle to a pleasant experience and the sense of being outdoors. To reduce echoes and excess noise, we chose to cover the addition with a perforated brick facade. By leaving out every other brick and adding sound absorption underneath, we succeeded in creating effective sound reduction. The abstract brick pattern gives the facade a compelling depth while serving an important function. To further ensure noise reduction and a pleasant sound environment, we chose acoustic plaster as a complement when re-plastering the old residential building.

a chic hotel. The passage between the hotel and the market hall now creates a new city flow through the block. Photo: Åke E:son Lindman

The result – a new city flow

The passage features site-cast concrete and terrazzo stairs. This creates a subtle yet contrasting transition between the market hall and the hotel. Photo: Lasse Olsson

We retained and restored an existing passage that leads from the street to the hotel’s courtyard. We also created a new passage to connect the courtyard to the market hall. Together, these changes have introduced a new city flow through the block.

“Now passersby can take a shortcut from Nybrogatan via the hotel and market hall to Humlegårdsgatan – which also benefits commercial activity in both buildings.” The new passage that cuts through the old brick and concrete construction required powerful support frames. We chose to expose these changes in painted black steel and site-cast concrete, while creating an understated, contrasting transition to the colorful, detailed environment of the market hall and hotel.

The new passage now connects the market hall to the hotel. Inside, Leontine Arvidsson’s artwork “Bäst före: torsdagen den 12 mars 2020” (“Best by: Thursday, March 12, 2020”) adds a striking visual element. Photo: Åke E:son Lindman.

Taken together, we’ve created an experience that feels like traveling back in time, while the market hall is relevant for the future once again. Time will tell if we’ve hit the right note, as we did with the temporary market hall. But for now the city, country and world have regained a piece of cultural heritage – and then some.

Footnote: The hotel operator and architect Per Öberg developed the design concept for the hotel.

Awards and Recognitions

In 2021, Östermalm Market Hall won the Swedish Lighting Prize (Interior Category) and Stockholm Building of the Year.

Contact person

Mark Humphreys

Lead Architect
+46 8 412 53 43

Swedish National Museum of Art

Eye-opening architecture - National Museum
Architecture, Cultural Heritage
Accessibility, Building Preservation & Restoration, Culture, Heritage Expertise, Renovation & Transformation
Client: National Property Board
Years of commission: 2013-2018
Architects: Wingårdhs with Tengbom as subcontractor
Prizes: Årets Betongarkitekter, Stenpriset, nominated for Kasper Salin

Through Erik Wikerstål, formerly Wikerstål Architects, Tengbom, as a sub-consultant to Wingårdhs, has carried out restoration, renovation, and updating of the Swedish National Museum of Art. On October 13, 2018, the doors were reopened to the public, and it is in every way a lighter museum that is met by the visitors.

It took five years with much respect, finesse, and expertise to dismantle the Swedish National Museum of Art and then reassemble it in an updated, modern, and accessible version. For 150 years, the museum has been rebuilt time and time again based on various prevailing ideals. They have built windows, lowered ceilings, and changed the floor plan. Now, on behalf of the National Property Board of Sweden, Tengbom, in collaboration with Wingårdhs, metaphorically opened the museum’s eyes, let in the light and re-established contact with the city and world outside.

“We approached the mission as restoring Friedrich August Stüler’s vision for the building to the original, but adapted it to today’s ideal for museum activities in combination with the needs and expectations of a public building,” explains Erik Wikerstål, responsible architect from Tengbom.

Above all, the work has entailed a major technical renovation focusing on personal safety, fire safety, climate, and accessibility. The result is a museum that is better for the visitor, better for the art, and better for the staff who work there.

All the light in the courtyards 

The team raised the courtyard floor to accommodate new ventilation equipment placed in Blasieholmensberg. They then lowered the church hall floor to its original level, creating an accessible entrance on the same plane. To improve accessibility, they also converted eight windows around the courtyards into doorways.

The southern courtyard has received an expressive addition in the form of a lift tower. It is designed to be a large sound-absorbing box with the function of an altar cabinet where the screens and technology for seminars are hidden behind two large doors.

Swedish National Museum of Art
Erik Wikerstål in front of the elevator tower.

“The only new form we have introduced is essentially a wickerwork structure on the lift tower,” Erik says. “We also added a small concrete service building at the back of the museum.”

Swedish National Museum of Art
The concrete servicebuilding.

Both courtyards now open up to the museum’s interior and the sky. New glass roof domes let in daylight and improve the acoustics. Sound travels up into the ceiling, where small glass pyramids on the walls help distribute it. Stained acoustic plaster absorbs the sound, preventing it from bouncing back.

In 2013, Wingårdhs and Wikerstål Architects won the contract for the National Museum on behalf of the National Property Board of Sweden. Wikerstål Architects became part of Tengbom in 2017. The project has already received several award nominations, including Stenpriset 2018, Betongpriset (extension), and Construction of the Year.

Contact person

Josefin Larsson

Business Dreveloper
+46 72 183 02 34

Gasometer

Industrial heritage repurposed for the arts
Architecture, Cultural Heritage
Accessibility, Building Preservation & Restoration, Culture, Heritage Expertise, Renovation & Transformation
Client: Stockholms Stad
Assignment year: 2017-
Where: Hjorthagen, Norra Djurgårdstaden
Project type: For musicals, concerts, events, conferences, televised galas, and more
Awards and Recognitions: Nominated for the World in Property Award 2024

Commissioned by the City of Stockholm’s Development Office, Tengbom has proposed transforming Gas Holder 2 in Hjorthagen into a state-of-the-art cultural venue with a banquet hall. The concept for the Gasometer—a “box within a box”—offers future visitors a spatial experience like no other.

Hjorthagen undergoing major development

Located just outside Stockholm, Hjorthagen is an area undergoing large-scale transformation. Once an inaccessible industrial zone, it will soon become home to around 15,000 new residents. The broader development includes approximately 6,000 apartments and 100,000 square meters of commercial space.

Gas holder no. 2

From gas holder to Gasometer

In 2017, Tengbom won a tender and we were entrusted with designing an international performance venue within Gas Holder 2. Now known as the Gasometer, the venue will host up to 2,300 guests, offering world-class concerts, musicals, and theater productions. At the top of the inner “box,” there will also be a banquet hall accommodating 1,000 seated guests.

Ferdinand Boberg designed the unique and historically listed gas holder in 1899. The exterior will remain in its original state, while the interior will transform into a space with spectacular spatial experiences. The performance hall will float within the larger structure, encapsulated by an outer shell.

Optimized for audience and acoustics

By stacking the audience over three levels, the design maximizes capacity while ensuring the best possible acoustics. Visitors will undoubtedly experience something extraordinary. The project is led by Tengbom architect Jan Izikowitz, whose previous work includes the Gothenburg Opera House.

Gas holder no. 2
Gas holder no. 2
Architect Jan Izikoviz, Tengbom

Gasometer in the larger context of Gasverket Västra

Gas Holder 2 is part of the Gasverket Västra development plan, which also includes a museum, school, preschool, sports hall, and office spaces.

Royal Swedish Opera moves in

In October 2024, it was announced that the Royal Swedish Opera would temporarily relocate to the Gasometer while the Opera House undergoes renovation.

Contact person

Elin Larsson

Project Lead
+46 702 75 67 66

The Solliden Stage

Modern expansion in historic environment
Architecture, Cultural Heritage
Accessibility, Building Preservation & Restoration, Culture, Heritage Expertise, Renovation & Transformation
Client: The Skansen Foundation
Location: Stockholm
Years of Commission: 2002–
Competences: Building preservation, Interior Design

Our specialists in building preservation have assisted in the restoration and construction of the The Solliden Stage, on the basis of Skansen’s ambition to create Northern Europe’s most modern outdoor stage. The fairground was also improved through renovations and additions. We weighed various qualities in the project, such as the location’s view of the entrance to Stockholm and the historic building value of the original stage, against expectations of modern stagecraft and acoustics.

The Solliden Stage
The Solliden Stage. Photographer: Tove Falk Olsson
The Solliden Stage
Photographer: Tove Falk Olsson

Perhaps you yourself have sat at this classic location and gazed out over one of Stockholm’s most beautiful views. Or at least heard of the popular outdoor TV show Allsång på Skansen?

The Solliden stage (Sollidenscenen) was designed by Nils Einar Eriksson in 1938. It was at that time technically and acoustically of a very high quality. The audience sat facing the view and listened to acoustic music that was amplified through the spiral form of the stage.

But today’s concert situations and stagecraft, especially for TV broadcasts, place new demands on the stage environment. To meet these needs, we designed a completely new stage. We also developed related ancillary buildings in cooperation with the Stockholm Beauty Council and Skansen’s own curators.

Solliden stage side sketch_TengbomThe team carefully restored the original stage, Snäckan (“The Shell”), preserving its cultural value and keeping it at the centre. They designed the new stage around it, raising and deepening the stage floor while extending the roof to cover the entire stage. Built with thin ship-building plate on a steel structure, the roof enhances both function and form. The new annexes feature façades of untreated oak, which will naturally age over time to match the adjacent Öland Windmill.

New and better audience space

We redesigned the fairground to offer more and better space for the audience. Seats now stand centrally in front of the stage, framed by wooden benches made from Skansen’s own oaks. To improve accessibility, dedicated spaces for wheelchair users were added at an elevated spot near the mills. More spaces are also available beside selected rows at Sollidenplan. Removing the front row at the stage opened up the view towards Stockholm’s entrance, creating a more inviting experience.

The Solliden StageThe Solliden Stage and its new stage and fairground debuted in 2013 during Skansen’s National Day of Sweden celebration on June 6th. The following weekend, a dedication concert featured Radio Sweden’s Symphony Orchestra, Tommy Körberg, and Amanda Sedgwick.

The Solliden Stage
Photographer: Tove Falk Olsson

Several Skansen projects by Tengbom

  • Ironmonger’s building: The ironmonger’s building in the town quarter was completed in keeping with Skansen’s ambitions as a copy of an existing building from the 1880s in Hudiksvall.
  • The Skansen Shop: In 2010-2011, we renovated The Skansen Shop, previously the Alhambra restaurant, in order to create more appropriate premises for office, storage and accommodation rooms.
  • Lill-Skansen: We participated in a parallel engagement for a new Lill-Skansen children’s zoo.
  • New buildings for wild boar and European bison: We designed a new building in 2007 for two wild boar families and a building for European bison.
  • Dressing-room building: Design of a new dressing-room building at the Galejan dance pavilion is under way in 2016.

Contact person

Josefin Larsson

Business Developer
+46 72 183 02 34

Thiel Gallery

Preserving a listed art museum
Thiel Gallery
Architecture, Cultural Heritage, Interior Design
Accessibility, Building Preservation & Restoration, Culture, Heritage Expertise, Renovation & Transformation
Client: The National Property Board of Sweden
Location: Djurgården, Stockholm
Years of commission: 2013-2019
Partners on GK commission: Tyréns (K), LEB, Allmänna VVS-byrån (V), Projektel (E), Brandskyddslaget, Geosigma, Storköksbyrån i Stockholm, Sjögrens hus.
Type of project: House architect
Competences: Historic Preservation, Interior design, Landscape, Accessibility, Project management, Sustainability

Founded in 1907 and situated in a walled park far out on Djurgården’s Blockhusudden, the Thiel Gallery is one of Sweden’s most beautiful museums. We have served as building architect and general consultant for the gallery since 2013, providing administrative support and taking responsibility for the listed building’s maintenance and development on an ongoing basis.

The architect Ferdinand Boberg designed the Thiel Gallery. He drew inspiration for the unusual building from the Orient, southern Europe and the late Art Nouveau era. Work on the venue was completed in 1907, realising the dream of financier and patron of the arts Ernest Thiel to create a home and art gallery. After being acquired by the state in 1924, Thiel was converted into a museum, before being conferred national listed building status in 1958. Our work on the museum always takes place in close collaboration with the National Property Board of Sweden. As well as the venue’s tenants.

Complex projects requiring a highly sensitive approach

Our projects at the Thiel Gallery are often of a complex nature, requiring knowledge and understanding of a range of factors related to climate, technology, logistics and programming within the scope of an art museum. With considerable respect for the cultural-historical values of this listed building, we carry out adjustments and highly skilled design work on a small and large scale. We also handle permit issues, long-term plans for maintenance and restoration as well as acting in an advisory capacity. Among other things, the commission requires advanced knowledge of installation techniques both new and old.

Our role in the project is fundamentally underpinned by a holistic approach, awareness and flexibility.

Effective collaboration and close contact

Since 2013, we have worked on a range of projects at the Thiel Gallery. We have renovated the café kitchen and cafeteria and installed new lighting in the exhibition halls. We have also prepared the Annex for the museum’s offices and conferences. To improve accessibility, we conducted a comprehensive survey of the entire venue. This led to the installation of a new lift and the creation of new public areas, including a shop, cloakrooms, and toilets.

Effective and clearly defined partnerships are fundamental to every project. To ensure this, we involve technical consultants and other specialists at an early stage. Close contact and long-term collaboration with administrators, tenants, and authorities remain essential. We also work closely with specialists, craftsmen, and contractors throughout the process. Our role in the project is built on a holistic approach, strong awareness, and flexibility.

Contact person

Mark Humphreys

Practice Director Stockholm
+46 8 412 53 43

The Royal Opera

To preserve a historic national stage
Architecture, Cultural Heritage
Accessibility, Building Preservation & Restoration, Culture, Heritage Expertise, Renovation & Transformation
Client: The National Property Board of Sweden
Location: Stockholm
Years of commission:: 2007-2012
Type of project: House architect
Competences: Culture & Sports, Interior Design, Historic Preservation

Between 2007 and 2012, we were the in-house architects of the Royal Opera in Stockholm. An inspiring task filled with responsibility which included making sure that the fantastic opera house from 1898 was developed and taken care of in the best possible way.

The architect Axel Anderberg designed the Royal Opera, Sweden’s national stage for opera and ballet, which opened in 1898. It stands on the same site as Stockholm’s first large opera building from 1782. Anderberg drew much of his inspiration from the Paris Opera. He gave the new opera house a Neo-Renaissance exterior, while designing the staircase, foyer, and salon in a Neo-Baroque style.

From stage technology to Golden Foyer

Today, the Royal Opera is a national monument. The opera house includes a complex mixture of advanced technology and working areas. Richly decorated, representative environments such as the Golden Foyer with its shimmering stucco, brocades and chandeliers. The twelve floors house a thousand rooms and many different activities – from stage technology in the basement via workshops, rehearsal rooms and dance studios, restaurants, dressing rooms, and all the way up to the costume designer’s colourful studio just above the roof of the salon.

Expertise and continuity

To be the in-house architect for something so amazing as an historic opera house is a great responsibility. In our role as renovation architects, we have to be experts on the building, its history, values and requirements. Our task included architectural, artistic, antiquarian, and technical oversight. We also ensured compliance with all regulatory requirements. Additionally, we made sure that every plan and action aligned with both management’s vision and the business requirements.

Photo: Sten Jansin
Photo: Sten Jansin

To take care of the opera house in the best possible way, long term plans need to be established both for maintenance and restoration. One of our most important tasks was to constantly walk the fine line between today’s requirements and the antiquarian requirements as well as qualities of the national monument.

A masterpiece of coordination

To be the in-house architect for the Royal Opera is in many ways a communicative masterpiece from a coordination stand point. The task requires constant communication with clients, managers, tenants, authorities, specialists, various consultants, contractors and craftsmen. There were many of us who worked intensively on the project – an amazing experience we will never forget.

Contact person

Mark Humphreys

Practice Director Stockholm
+46 8 412 53 43

Grand Hôtel

Collaboration in classic setting spanning a century
Architecture, Cultural Heritage, Interior Design
Accessibility, Building Preservation & Restoration, Heritage Expertise, Hotels & Meetings, Renovation & Transformation
Client: Vectura fastigheter, Grand Hôtel
Location: Stockholm
Developer: Pefo Bygg, Skanska, Kungsfiskaren
Years of commission: 2010-2016
Kompetences: Hotel & Restaurant, Building preservation

Our collaboration with the Grand Hôtel in Stockholm dates back nearly 100 years. In the 1920s, Ivar Tengbom redesigned the hotel’s façade, lobby, and banquet hall Vapensalen. In 2014, we carried Ivar’s work on the lobby into the next era. And in 2020, it was the entrance’s turn to step into the future.

Preserved history – modern solutions

The lobby is the heart and face of the hotel. Preserving and highlighting details from the hotel’s rich history was of utmost importance to both us and the Grand Hôtel. Our goal was to give the space a contemporary expression and functionality while meeting the high standards of heritage preservation and accessibility adaptation.

Foto: Åke E:son Lindman
Photo: Åke E:son Lindman

“The collaboration with the Grand Hôtel is particularly enjoyable as it dates all the way back to Ivar Tengbom’s time. We’ve worked to recapture the essence of the changes Ivar made in the 1920s while also incorporating new, modern solutions,” says Karin Hagelberg, architect.

Bright and elegant space for everyone

Our concept has transformed the lobby into a bright and elegant space. We seamlessly integrated modern functionality and technology into the historic setting. A new marble floor with large inlaid rugs, along with a concealed sound and lighting system, brings the lobby into a new era.

Foto: Åke E:son Lindman
Photo: Åke E:son Lindman

The beautiful ceiling moldings have been highlighted in a new way, and the hotel’s antiques are artfully combined with modern details. The addition of new ramps and railings ensures that the lobby is now accessible to everyone.

Carefully updated hotel rooms

Since 2010, we have continuously revitalized a large portion of the hotel rooms, most recently on the second floor and the third floor of the Royal Building. We have designed many rooms for flexible use, adding classic double doors to allow seamless connections. To enhance natural light, we have also introduced new French balconies in some rooms and clad the bathrooms in Carrara marble for a refined finish.

New era – new entrance

Foto: Per Kallstenius arkitektkontor

When Grand Hôtel updated its iconic entrance in 2020, Ivar Tengbom’s influence remained present throughout the process. The team replaced the revolving door with two glass panels, creating a sense of openness while keeping cold winds at bay. Inside, the space once dominated by the revolving door became a grand transitional zone between outdoors and indoors. The outer canopy was redesigned to improve the view from within. Custom-designed lanterns, recessed light wells, and gold-toned metal in the entrance ceiling now cast a warm, welcoming glow. In the lobby, the staircase was moved further into the room, returning to its original position from Ivar Tengbom’s time. His pattern design from the elevator doors was also revived, now adorning the new accessibility lift and the railings.

Karin Hagelberg explains, “We built on what already existed. With great respect for history and a sensitive approach, we drew inspiration from timeless details and environments.”

Foto: Per Kallstenius arkitektkontor

Contact person

Josefin Larsson

Business Developer
+46 72 183 02 34

Waldemarsudde

The legacy of Prince Eugen
Waldemarsudde 2015
Architecture, Cultural Heritage, Interior Design, Landscape
Accessibility, Building Preservation & Restoration, Culture, Heritage Expertise, Renovation & Transformation, Residential environments
Client: The National Property Board of Sweden
Location: Djurgården, Stockholm
Years of commission: 2013–2015
Type of project: House architect
Collaborative partners: LEB, Tyréns, Projektel, Brandskyddslaget
Areas of expertise: Heritage, Landscape

Waldemarsudde is a unique environment filled with great experiences. It has beautiful countryside, fascinating historical buildings and fantastic art. Waldemarsudde is primarily associated with Prince Eugen – botanist, landscape painter and art collector – who lived here in the early 1900s.

The legacy of Prince Eugen

The palace was commissioned by Prince Eugen and designed by the architect Ferdinand Boberg, and was built between 1903 and 1905. The gallery building was added in 1913 to house the Prince’s extensive art collection. Upon Prince Eugen’s death, the entire Waldemarsudde estate was bequeathed to the state, which was to manage it as a museum. Waldemarsudde is one of Sweden’s best known and most visited art museums and has been a listed building since 1993.

Waldemarsudde Tengbom 2015
Photo: Nina Broberg

Responsibility for maintenance and development

Here at Tengbom, we have the framework agreement as building architect and general consultant for Waldemarsudde. This means that we are responsible for the listed building’s maintenance and development, in collaboration with the National Property Board of Sweden and the Prins Eugens Waldemarsudde Museum. We work primarily in the areas of architecture, conservation and technical matters, as well as regulatory requirements. In conjunction with the consultant group, as building architect we carry out project planning as well as investigative assignments. We are consultants and handle such things as permit issues and long-term plans for maintenance and restoration.

Adaptation and visions for the future

One of the projects we’ve worked on at Waldemarsudde is the extensive rebuilding of the museum shop and entrance hall, including improvements to accessibility at the main entrance, both inside and out. We have focused on environmental aspects, lighting, acoustics, and both interior and exterior maintenance. The park and gardens have also been part of our work. Additionally, we developed a proposal to open the old linseed oil mill to the public.

A complex project with specific challenges

The project at Waldemarsudde presents constant challenges. Working in an art museum means tackling environmental, technical, logistical, and programming demands. The focus is on adapting and refining the design to meet today’s needs while carefully preserving Waldemarsudde’s cultural value.

Close collaboration is essential

Collaboration has been key throughout the process. Technical consultants and specialists often join early on. Each project involves close contact with managers, tenants, and authorities. Craftsmen, contractors, and other consultants also play a vital role. This demands flexibility, coordination skills, initiative, and a keen sense of the bigger picture.

Contact person

Josefin Larsson

Business Developer
+46 72 183 02 34