Soviet Square

Lukiškės Square, Vilnius, Lithuanian Soviet Socialist Republic, 1975. See Photo 17 here.

Federalism contributed to the collapse of the Soviet Union.

Said Putin: 

Putin was particularly critical of Lenin’s concept of a federative state with its entities having the right to secede, saying it has heavily contributed to the 1991 breakup of the Soviet Union. He added that Lenin was wrong in a dispute with Joseph Stalin, who advocated a unitary state model.

(P.S. Stalin is back in fashion.)