Painting by unknown artist.

Painting found here, along with text. Excerpt:

Less than two and a half months after June 22, 1941, when the Soviet Union was attacked by Nazi Germany, German troops were already approaching Leningrad. The Red Army was outflanked and on September 8, 1941 the Germans had fully encircled Leningrad and the siege began. It lasted for about 900 days, from September 8, 1941 till January 27, 1944.