EuroBasket, previously referred to as the European Basketball Championship, is the main basketball competition contested biennially by the men's national teams governed by FIBA Europe, the European zone within the International Basketball Federation. The championship was first held in 1935 and has been regularly contested every two years since 1947; starting in 2017, it will change to a four-year cycle. Through 2017, it also alternates between serving as a qualifying tournament for the Summer Olympic Games and the FIBA Basketball World Cup. The most successful nation is the now defunct Soviet Union with fourteen titles, while Spain were the 2009 and 2011 champions. France are the reigning champions, having won FIBA EuroBasket 2013.