Letzigrund is a stadium in Zürich, Switzerland, and the home of the athletics club LC Zürich, and the football clubs FC Zürich and Grasshopper Club Zürich. LC Zürich is a spin-off of FC Zürich whose members constructed the stadium in 1925. Grasshopper-Club is using it as their home stadium since 2007. The annual athletics meet Weltklasse Zürich—part of the IAAF Diamond League—takes place at the Letzigrund since 1928, as well as frequent open-air concerts. On the Letzigrund track on 21 June 1960, Armin Hary was the first human being to run the 100 metres in 10,0 seconds.