Charlotte ten Dijke and Bart Mispelblom Beyer first collaborated while studying architecture and building technology at Delft University of Technology. As students they worked together on the design of stage scenery for music theatre productions. In 1985 they graduated with distinction and then worked for various offices. They opened TANGRAM architecture and urban landscape in 1990 after winning the Europan I , a biennial European design competition for young architects.
Charlotte and Bart lecture in the Netherlands and abroad and supervise major building projects. Since 2011 they have been visiting professors of architecture at RWU in Bristol in the United States. Their studies into future-proof building, high density, the importance of the ’empty space’, and dimensions of sustainability have been published in The City of the Future (2019), Beautiful Compact NL (2010), Balans  (2011) and MÀ-SSA meaningful emptiness (2003) .

Charlotte is a member of the Space & Habitat Forum of environmental group Stichting Natuur en Milieu. She was a member of the design review committees in Utrecht and Leidsche Rijn, a position she now holds in Amsterdam. She also sat on the board of Architectuur Lokaal.

“At work I am extremely focused on an assignment. Thinking about a design or coming up with solutions also continues at home. That is also because Bart and I not only run an agency together but are life partners too, then it never really stops. This often results in long conversations about architecture, or special solutions for a difficult problem. We can really reinforce each other in this. 
To clear my head, I love to ride my Frisian mare a few times a week.”



Bart has been a member of various municipal design review committees and chairs the Go Dutch Consortium, an amalgamation of Dutch offices that join forces to work on projects in the United States. As part of the Go Dutch exchange programme, he was appointed visiting professor in 2014 at the College of Agriculture, Urban Sustainability and Environmental Sciences (CAUSES) at the University of the District of Columbia, United States.

“A building must be attractive in the broadest sense of the word. For the owners, users and neighborhood. That is our commitment. During the development process I like to explore the limits of what is possible: the location, the regulations and what is politically and socially feasible. The proper functioning of the city is very important to me. A city is much more than a collection of buildings and public space; it must be a warm, safe and sustainable home for the residents.

Although I am focused on the city, I  like to relax in the mountains. The peace, harmony and naturalness that you experience during a mountain hike…we try to convey that feeling in our buildings.

Of course we couldn’t do what we do without the help of our great staff.”