The Museum of Occupations and Freedom Fights occupies the former KGB headquarters on Gedimino Avenue, a building that served as the Gestapo's base during the Nazi occupation and then the KGB's during the Soviet period. The building's basement prison — where Lithuanians were interrogated, tortured, and in some cases executed — is preserved in extraordinary detail, with solitary confinement cells, interrogation rooms, and the execution chamber.
The museum covers the full period of Soviet occupation: the mass deportations of 1941 and 1949, the partisan resistance movement (the Forest Brothers), and the eventual restoration of independence in 1990–91. The documentary archive is extensive. This is not a comfortable museum — the KGB maintained meticulous records — but it is one of the most honest and well-presented accounts of Soviet terror anywhere in the former Soviet sphere. Allow two hours. Aukų St. 2a / Gedimino Ave 40. Open Tue–Sun 10:00–18:00.