May 1917: detachments of workers and soldiers with slogans on the streets of Petrograd. May 1918: demonstration of workers in Petrograd. May 1919 : crowded demonstration in Petrograd. May 1920: Subbotnik - workers, sailors cleaning the streets of Leningrad. Lenin's speech at the opening of the monument to Karl Marx in Moscow. May 1921: workers of Moscow, performances of artists on the square. Sverdlov. May 1922: demonstration, meeting, oath of the Red Army. May 1923: Moscow, demonstration, speech by N. A. Bukharin. May 1924: the wooden Mausoleum of V.I.Lenin. May 1925: Moscow, Red Square: demonstration, military parade. Germany, Berlin: demonstration. E. Thalmann's speech. Mexico: a festive procession on the streets of cities. May 1926: rally of railroad workers. Czechoslovakia, Prague: demonstration, meeting. ; France: workers' holiday on the outskirts of Paris. Germany: demonstration. May 1927: Moscow, Red Square: demonstration, sports festival. Demonstrations in the villages.