Claim: Gatchina the town was known as Trotsk (named for Leon Trotsky) from 1923–1929 under the Soviet Union, and was known as Lindemannstadt from 1941–1944 under Nazi Germany.
Evidence: Trotsk 1923–1929 Leon Trotsky Soviet_Union Soviet Union Lindemannstadt 1941–1944 Nazi_Germany Nazi Germany 
It was previously known as Khotchino, Gatchina (until February 14, 1923), Trotsk (until August 2, 1929), and Krasnogvardeysk (until January 28, 1944). On February 14, 1923, Gatchina was renamed Trotsk (Russian: Троцк) by the new Soviet authorities, in honor of Leon Trotsky. Gatchina was occupied by Nazi Germany from Saturday, September 13, 1941, following the German invasion of the Soviet Union during World War II. The Germans renamed the town Lindemannstadt, in honor of the Wehrmacht general Georg Lindemann, and looted much of the Gatchina Palace for its collections of art. On January 26, 1944, the Germans abandoned Lindemannstadt during their retreat, setting fire to Gatchina Palace and vandalizing much of the park.