About Us - Rex Arkitektbyrå

Olle Rex

“Now I can confidently put my 50 years of work experience to good use.”

Olle is founder of the company as well as owner together with Fredrik, but first and foremost a great source of ideas and experience for customers as well as colleagues. Olle sees the long-term development of the company and is driven by evolving the architectural knowledge.

He creates with curiosity and bravery thanks to all his earlier experience, and he quickly sees solutions and can sort out ideas that will not hold in the long run. The confidence comes from years of trying out ideas for various needs, both practically and architecturally. This also makes it easier to assess new ideas that no one has seen before. “It is such a joy to enthuse the clients based on experience, creative ideas and solutions.”

Fredrik Widigs

"Sustainable architecture arises where building tradition meets the future."

Fredrik is the CEO, co-owner, and lead architect at Rex Arkitektbyrå and holds a master's degree in architecture from KTH (2014). Since joining Rex, his passion for building preservation and antiquarian matters has reached new heights, in natural harmony with the firm's focus on preserving and carefully developing culturally and historically valuable buildings.

As CEO, Fredrik is dedicated to managing and further developing the architectural vision with the highest ambitions for quality and creativity that Olle has established. By combining respect for building tradition with curiosity about future technologies, he aims—together with colleagues and clients—to create architecture that is beautiful, thoughtful, and sustainable. "For me, beauty and artistic expression are fundamental to human experience. Therefore, craftsmanship as a cultural expression is an integral part of our architecture."

Elin Andersson

”It’s exciting to work with projects where new meets old, and we have many projects of that kind.”

Elin started here in 2019, she studied the first three years of the education in Umeå where the school is more focused on the creative side of architecture. That might be the reason why Elin likes the early, creative project phases, to sketch and solve problems. She is curious, wants to learn a lot and try out new things.

During her master studies in Stockholm Elin chose the direction towards sustainability in the building process. She is devoted to sustainable materials, to restore and make use of the existing, and has previous experience from residential project, renovations and extensions. “It is all about finding solutions where sustainable ideas and regulation for renovation and construction can go hand in hand.”

Carolin Frögren

“Genuine crafts and high level of detail must be highly valued”

For as long as she can remember, Carolin has been interested in buildings, interior design and how different environments affect its surroundings. Originally the interest comes from the family's boatyard; an eye for detail has always been highly valued. The historical interest was an important reason why Carolin during her studies chose a specialization that focused on culturally sensitive places, reconstruction and restoration.

In addition, there is a great curiosity and desire to find the best solution - the combination of these qualities has made her a problem-solving, committed and thoroughly working architect. Carolin appreciates the versatility of the profession and finds it exciting to follow the unique development of each project. "The progress of a project takes place step by step and in close consultation with the customer, it is a privilege to be able to follow that development from the first ideas to the finished result."

Hilda Carlsson

"Harmonious environments where people thrive are key to good architecture."

Hilda comes from a background in textile art, but also has an interest in human well-being. Through a desire to create harmonious environments where people thrive, she has found her way into architecture. Since autumn 2022, Hilda has been an important part of our team here at Rex Arkitektbyrå. Her experience comes from residential projects, but during her time with us, she has deepened her holistic perspective and learned to develop projects down to the smallest detail.

For Hilda, every project is a unique opportunity to explore and maximize its potential. "My drive lies in listening carefully and fully understanding, and based on each project's conditions, finding its full potential."

Katerina Gurova

"Every space we create is a reflection of the life that will be lived there."

Katerina's lifelong artistic interest led her to pursue an education in architecture. She particularly enjoys the early stages of the creative process where she can establish a theme that permeates the project from the overall concept down to the finest detail. Her time in New York, where she designed exclusive residences and hotels, deepened Katerina's ability to create spaces that are both aesthetically pleasing and deeply personal.

By uniting precision with problem-solving, Katerina transforms visions into concrete plans, always focusing on the unique needs of the site and its users. "Designing environments where details are not just seen but experienced, is what inspires me every day.”

Fredrik Mandorf

"Architecture that grows from sustainable principles, with roots in history and craftsmanship, becomes both timeless and meaningful."

For Fredrik, architecture has long been a natural direction, as it combines artistic design with a solution-oriented approach. Growing up in the dense nature of Värmland has fostered a strong focus on sustainability that permeates his work. Alongside a special interest in craftsmanship, history, and tectonics, a deep love for our cultural heritage has developed over time.
Through his experiences at Chalmers, KTH, and in Switzerland, Fredrik has built a solid knowledge base. Having previously worked at a larger firm, he now finds inspiration in the intimacy and dynamic nature of a smaller office.

Gezelius' idea of "free-spirited tradition" has served as a guiding principle for the architecture he aims to create, often drawing inspiration from local materials and historical methods. Looking back is an effective tool, as answers are often found in the surroundings and in what has already been built. "History is a rich encyclopedia of solutions and inspiration."

Linnea Thörne

”Even the smallest details contribute to the overall sense of care and permanence.”

Linnea has always been fascinated by spaces and their impact—something that initially felt abstract but that she approached with curiosity and exploration through architecture. During her studies at the Royal Institute of Technology (KTH) and Tokyo City University, Linnea deepened her expertise in transformation and renovation. Her time in Tokyo provided her with new perspectives on details, patterns of life, and design.

Linnea values hand-drawn sketches as indispensable tools for exploring ideas, fostering creativity, and inviting discussion. With experience in both new construction and renovation projects, Linnea has extensive knowledge of project management and project planning. She strives to create enduring architecture that considers both the built environment and the human experience. ”Architecture is an interaction – not just a vision to be realized, but also a result of consideration and compromise.”

Therese Antman

"Sustainable architecture harmonizes with both people and the environment."

Therese is an experienced architect with a passion for creating projects where details and sustainable solutions take center stage. With several years of experience from her own practice, she has worked on a wide variety of assignments – from furniture design and extensions to new construction projects.
With extensive experience in managing processes from concept to completion, Therese thrives in close collaboration with clients, where projects progress through a careful and creative partnership.

She is driven by a desire to create architecture that enhances the unique character of a site, always keeping the client's vision at the forefront. Her practical expertise, combined with a creative eye for both the big picture and fine details, makes her a valuable part of our team.
"I love the process where ideas take shape and transform into places where people can live and thrive."

Ninni Juchault des Jamonières

"Good architecture is a materialized testament to a craftsmanship and artistic ambition."

Ninni holds a master’s degree in architecture from 2011, educated at KTH Stockholm and ETH Zürich. After spending much of her life outside Sweden and gaining experience from some of the most prestigious architecture firms in Paris, such as Renzo Piano Building Workshop, as well as founding her own architecture studio, she returned to her Swedish roots in 2024.

Her international experience, extensive travels, and interactions with people from various cultures have shaped her distinctive approach to architecture. As a senior/lead architect, Ninni plays a key role in Rex Arkitektbyrå’s focus on cultural heritage building preservation. With expertise in historic buildings, exclusive interior designs, and experience in projects of varying scales, she brings a unique cross-cultural perspective to the team. “In my design process, I continuously explore new solutions, forms, finishes, and textures where nature, traditions, craftsmanship, and local architecture take a central role.”

Our Team