Opening Saturday: As the Soviet Union disintegrated, Russian artists began to explore long-forbidden topics, including religious and spiritual themes. Some wanted to express faith after decades of repression while others used humanistic imagery to test official limits on self-expression. Much of the art was gathered, starting in the 1960s, by Moscow collector Tatiana Kolodzei and her daughter Natalia. Seventy works from their 7,000-piece collection, now based in New Jersey, are on loan in an extraordinary show spanning four decades. The 2007 image pictured is “Return of the Prodigal Son” by Olga Bulgakova. (Saturday-June 9. Hours: 10 a.m.-5 p.m. Mon.-Fri., 10 a.m.-4 p.m. Sat., 1-5 p.m. Sun. $9 adults. The Museum of Russian Art, 5500 Stevens Av. S., Mpls. 612-821-9045 or