USSR Union of Artists
Since 1920 he lived in Moscow, where was the first art columnist of the newspaper Pravda, worked in the ROSTA Windows together with Vladimir Mayakovsky, and was professor of history of the Western art at the VKhUTEMAS. In 1927–29 he was missioned to Paris by the People's Commissar for Education A. Lunacharsky to read lectures on new Soviet arts. In 1932 he has contributed to the organization of the Moscow Regional Union of Soviet Artists (МОССХ) which later has been extended to the USSR Union of Artists.