The first state museum of Russian fine arts in Russia - the State Russian Museum - resumed full-fledged work in Leningrad. On 9 May 1946, the opening of the first post-war exposition occurred in the halls of the Mikhailovsky Palace. At first, only the first floor was available, but later, in the autumn, the second floor was opened as well.

From the first day of the Great Patriotic War, the museum`s workers tried their best to save the collections, which included 136,000 exhibits. Some 26,816 of the most valuable exhibits were evacuated to Gorky (Nizhny Novgorod) and Molotov (Perm). The museum lost almost all of its staff members: before the war, there were 300, and by April 1942 only five people remained. During the war, 11 explosive bombs and more than 100 firebombs fell on the museum’s buildings. The Benois Wing was significantly damaged - half of the outbuilding from the side of Inzhenernaya Street was destroyed. “The entire small team, regardless of age, vigorously took part in extinguishing firebombs and in boarding up windows with plywood, which shattered due to the blasts. Everyone safeguarded the museum day and night”, Pyotr Baltun, acting director of the Russian Museum, wrote.

On 14 October 1945, a train with the evacuated exhibits arrived in Leningrad, including icons painted by Rublev, “The Last Day of Pompeii” by Karl Bryullov, “Barge Haulers on the Volga”, and “Reply of the Zaporozhian Cossacks” by Ilya Repin,as well as  paintings by Argunov, Ugryumov, Rokotov, and other artists. Caches with sculptures were uncovered in the garden of the Mikhailovsky Palace.

Renovations on the building continued for more than a year and the restoration of the garden was completed by the end of the 1950s.

Source: 

Peter Baltun “The State Russian Museum - evacuation, blockade, restoration. From the memoirs of a museum worker"