context: The monument to Karl Marx in Moscow is a sculptural monument made of gray granite, erected in honor of the founder of Marxism, the activist of the international communist movement Karl Marx in Moscow on Theater Square. Sculptor - Leo Kerbel; architects - R. A. Begunts, N. A. Kovalchuk, V. G. Makarevich, V. M. Morgulis. Opened on October 29, 1961.
question: Where was the first monument to Karl Marx installed in Russia?
answers.text: in Moscow on Theater Square