NKVD buildings in former Soviet Union - during the first years of the Soviet Union the NKVD took over a number of existing buildings, many building were also constructed for offices and investigation/torture chambers and internal prisons.
Russia Moscow Lubyanka (KGB), formerly All-Russia Insurance Company, rebuild 1940 and 1983 Saint Petersburg Bolshoi Dom at Liteynyi Prospect Vladivostok Far Eastern National University Main Building, NKVD 1939-1956
Kyiv, Ukraine now the Cabinet of Ministers of Ukraine October Palace of Culture, originally a "Seminary for Young ladies"
Minsk, Belarus now KGB building, constructed after the war, see
Baku, Azerbaijan now the State Frontier Service