Crimson Architectural Historians is Ewout Dorman, Annuska Pronkhorst, Michelle Provoost, Simone Rots, Wouter Vanstiphout and Cassandra Wilkins. Since 1994, when Crimson became part of the planning team for the extension of Utrecht ’Leidse Rijn’, the office has developed a hybrid practice that takes the contemporary city as its object. Crimson designs for the city, researches it, writes texts and books about it, shows it in exhibitions and works of art, teaches about it, gives advice on it and makes policies for it.