From 1940 to 1945 the Small Fortress served as the prison of the Prague Gestapo. In 1994 a new permanent exhibition was opened here, devoted to the history of the political prison; it bears witness to the persecution of the Czech nation under the Nazi regime during the Second World War, and records the fates of Czech prisoners transferred to other concentration camps within the Nazi German Reich.
- The Small Fortress 1940-1945
- The Terezín Memorial art exhibition "Art against fascism and war"
- The prisoner's laundry
- The Litoměřice Forced Labour Camp 1944-1945
- Milada Horáková 1901-1950
- The perpetrators of crimes. The SS Repressive Staff in Terezín and Litoměřice 1940 – 1945.
- The Internment Camp for Germans – the Small Fortress 1945-1948
The Small Fortress exhibition spaces are used for short-term exhibitions, documentary films are shown in the cinema, and a variety of brochures, books, videocassettes and souvenirs are on sale.