May Day demonstration and meeting of workers in Vienna. The streets of the city are decorated with national flags, red banners, banners with the inscriptions: "Against the warmongers", "Workers' unity", "Children need peace as well as flowers in the sun." Demonstrators walk down the street, past the podium, on which are the leaders of the Austrian Communist Party I. Koplenig, F. Fürnberg. The head of the Vienna city organization of the Austrian Communist Party, Mahler, speaks at the microphone.