You'll want to browse the collections at New Tretyakov Gallery - Museum of Modern Art, Art Gallery of the European and American Countries of the XIX-XX centuries, and Gallery of 19th and 20th Century European and American Art. Cathedral of Christ the Savior, Armoury Chamber, and Grand Kremlin Palace are monuments to see when you're exploring the area around Red Art and Filimonov Gallery. You can watch performances at Theater of Modern Drama, Vakhtangova Theatre, and Forum Hall if you're interested in local theater.