Ответ: a fortress in the center of Moscow and its oldest part, the main socio-political, historical and artistic complex of the city, the official residence of the President of the Russian Federation, until the collapse of the USSR in December 1991 was the official residence of the General Secretary of the CPSU Central Committee (in 1990-1991 - the President of the USSR ). One of the most famous architectural structures in the world.

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