Hermitage Museum Andrew W. Mellon acquired 21 works of art from the Hermitage and later donated to form a nucleus of the National Gallery of Art in Washington, D.C. (see also Soviet sale of Hermitage paintings). With the German invasion of the Soviet Union in 1941, before the Siege of Leningrad started, two trains with a considerable part of the collections were evacuated to Sverdlovsk. Two bombs and a number of shells hit the museum buildings during the siege. The museum opened an exhibition in November 1944. In October 1945 the evacuated collections were brought back, and in November 1945 the museum
Hermitage Museum on permanent display in several small rooms in the northeastern corner of the Winter Palace on the first floor. In 1993, the Russian government gave eastern wing of the nearby General Staff Building across the Palace Square to the Hermitage and the new exhibition rooms in 1999. Since 2003, the Great Courtyard of the Winter Palace has been open to the public providing another entrance to the museum. Also in 2003, the Museum of Porcelain opened as a part of the Hermitage on the basis of the Imperial Porcelain Factory. In December 2004, the museum discovered another looted work of