Bolshoy Dom became the subject of numerous urban legends in Soviet and Russian culture due to its association with the secret police, including all buildings of the FSB being nicknamed Bolshoy Dom. The common conspiracy theory about the building is that it contains a large amount of secret underground floors, leading to jokes about Bolshoy Dom being the tallest building in Saint Petersburg. There is also a legend that the building survived the Siege of Leningrad during World War II because Nazi Germany was aware that German prisoners of war were housed in the top floor, preventing it from being bombed.