Being Serbia's primate city, Belgrade has special administrative status within Serbia. It is the seat of the central government, administrative bodies, and government ministries, as well as home of almost all of the largest Serbian companies, media, and scientific institutions. Belgrade is classified as a Beta-Global City. The city is home to the Clinical Centre of Serbia, one of the hospital complexes with the largest capacity in the world, the Church of Saint Sava, one of the largest Orthodox church buildings, and the Štark Arena, one of the indoor arenas with the largest capacity in Europe. Belgrade hosted major international events such as the Danube River Conference of 1948, the first Non-Aligned Movement Summit (1961), the first major gathering of the OSCE (1977–1978), Eurovision Song Contest (2008), as well as sports events such as the first FINA World Aquatics Championships (1973), UEFA Euro (1976), Summer Universiade (2009) and EuroBasket three times (1961, 1975, 2005).