The Finlandia Hall is a congress and event venue in the centre of Helsinki on the Töölönlahti Bay, owned by the City of Helsinki. The building, which was designed by architect Alvar Aalto, was completed in 1971. Every detail in the building is designed by Aalto. The designs were completed in 1962, with building taking place between 1967–1971. The Congress Wing was designed in 1970 and built in 1973–1975. In 2011, the building was expanded with new exhibition and meeting facilities. Finlandia Hall is known as the venue for the OSCE Summit (Conference on Security and Co-operation in Europe) held in August 1975, attended by 35 world leaders, including the leader of the Soviet Union, Leonid Brezhnev, and the President of the United States, Gerald Ford.