The city of Leningrad. Different views of the Field of Mars; a monument to A.V.Suvorov; mass graves of those who fell in battles during the February and October revolutions of 1917; Eternal flame. Engravings, paintings with images of parades, military exercises on the Champ de Mars during the reign of Emperors Paul I, Alexander I, Nicholas I. Photographs depicting festivities on the Champ de Mars: attractions, trade from stalls. Photos: Petrograd during the February Revolution of 1917; mass demonstration on Nevsky Prospekt; posters with the inscriptions: "Down with the war!", "Down with the tsarist monarchy!", "Long live the Democratic Republic!" Photos: funeral procession on Nevsky Prospekt, on the Field of Mars; funeral ceremony for the heroes of the February Revolution of 1917. Photo: celebration of May 1, 1917 on the Champ de Mars; there are demonstrators with placards and banners; V. I. Lenin makes a speech. Reproductions from paintings by artists V. G. Tsyplakov, V. S. Bibikov, Levushkin, depicting V. I. Lenin, the cruiser Aurora, storming the Winter Palace. Photo. Anti-aircraft guns on the Field of Mars during the Great Patriotic War. Pioneers, Suvorovites, veterans of the Great Patriotic War lay wreaths and flowers on mass graves on the Field of Mars.