Karel Prager (1923 - 2001) was one of the most important figures of Czech architecture in the second half of the 20th century. His most outstanding works originated in the 1960s, when he participated in many architectural competitions and designed what was probably the most important building in Prague: the former Federal Assembly. The exhibition presents a comprehensive collection of Prager's works from the 1950s until the end of his life. The artifacts on display include designs for the Institute of Macromolecular Chemistry of the Academy of Sciences of the Czech Republic, the Federal Assembly, the buildings in the Emmaus, the Faculty of Mathematics and Physics at Charles University, the New Stage of the National Theater, the reconstruction of the Rudolfinum gallery and concert hall, and the U Kříže residential ensemble. The exhibition also presents various competition proposals and unrealized studies (for example the Superstructures over the Košíře district in Prague). The largest part of the exhibition consists of plans and models from the architect's estate, complemented by Pavel Frič's present-day photographs of Prager's buildings.