Academy of Sciences of the USSR

"The Academy of Sciences of the Soviet Union was the highest scientific institution of the Soviet Union from 1925 to 1991, uniting the country´s leading scientists, subordinated directly to the Council of Ministers of the Soviet Union (until 1946 – to the Council of People´s Commissars of the Soviet Union).

In 1991, by the decree of the President of the Russian Soviet Federative Socialist Republic, the Russian Academy of Sciences was established on the basis of the Academy of Sciences of the Soviet Union." - (en.wikipedia.org 30.10.2019)