The Russian Museum today is a unique depository of artistic treasures, a leading restoration center, an authoritative institute of academic research, a major educational center and the nucleus of a network of national museums of art. The Russian Museum collection contains more than 400.000 exhibits. The main complex of museum buildings - the Mikhailovsky Palace and Benois Wing - houses the permanent exhibition of the Russian Museum, tracing the entire history of Russian art from the tenth to the twentieth centuries. The museum collection embraces all forms, genres, schools and movements of art. Over the past twenty years, the museum complex has grown to include the Stroganov Palace, St Michael's (Engineers) Castle and the Marble Palace. The complex also includes the Mikhailovsky Gardens, Engineering Gardens, Summer Garden (including the Summer Palace) and the House of Peter the Great.