The first Worker's Olympiad was the winter games held in 1925 at the German town of Schreiberhau which today is a part of Poland. Winter games were followed by summer Olympiads at Frankfurt am Main. No national flags were used at the Workers' Olympiads but a red flag of international workers' movement instead. Best athletes were awarded with diplomas, they did not receive medals like athletes in the Olympic Games.Olympic Villages were not built, the athletes from different countries stayed at private accommodation of local families.
International Workers' Olympiads were more than just a games for the top athletes. The festival was based on a mass participation, it did not restrict entry on the grounds of sporting ability. 1931 Workers' Summer Olympiad in Vienna was the largest event with the participation of 100,000 athletes from 26 countries. The Vienna Workers' Olympiad attracted some 250,000 spectators. It was much bigger event than the 1932 Summer Olympics at Los Angeles, both in number of participants as well as spectators.Praterstadion (now Ernst-Happel-Stadion) was constructed between 1929 and 1931 for the 1931 Olympiad.