During its existence, the Union of Soviet Socialist Republics was by area the world’s largest country. It was also one of the most diverse, with more than 100 distinct nationalities living within its borders. In addition to having the world’s longest coastline, the U.S.S.R. had the longest frontiers. Under the constitution adopted in the 1930s and modified down to October 1977, the political foundation of the U.S.S.R. was formed by the Soviets (Councils) of People’s Deputies. These stunning historical photos were taken by some of the best Soviet Union photographers will bring you a great trip back to the USSR era. So vote your favorites, and don’t forget to share.