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 Architekten in 1990 after winning the Europan 1 competition.

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 is also on the board of Architectuur Lokaal.



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. Since 2011 both Charlotte and Bart have been visiting professors of architecture at RWU in Bristol in the United States. As part of the Go Dutch exchange programme, Bart 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.

Charlotte and Bart lecture at home and abroad and supervise major building projects. Their studies into building in high densities, the design of empty space and dimensions of sustainability have been published in MÀ-SSA (2003), Prachtig Compact NL (2010) and BALANS (2011).