This 18th-century merchant's mansion holds an impressive collection of 20th-century art and nonconformist art from Russia and the former Soviet Union, with works by Malevich, Kandinsky, Chagall, Pivovarov, Rabin, and Lissitsky the main attractions. Be sure to explore the courtyard, which is filled with bronzes and stone sculptures and statues. The Museum of Modern Art also includes three other Moscow branches, which you can visit using the same ticket on the day of purchase.