Liga de Fútbol Profesional (Professional Football League), commonly known as La Liga, is the professional football league in Spain. It is considered to be the best league in the world. Nine clubs have been crowned Campeones de Liga. Since the 1950s, Real Madrid and FC Barcelona have dominated the competition. The former have been champions 29 times while the latter have won it on 18 occasions. However during the 1930s and 1940s and in more recent seasons, La Liga has been more competitive. Other winners include Valencia CF, Sevilla FC, Atlético Madrid, Deportivo de La Coruña, Athletic Bilbao, Real Sociedad and Real Betis. La Liga also boasts the two most successful teams in European competition history in Real Madrid and FC Barcelona. In 2005/06 FC Barcelona won the UEFA Champions League and Sevilla FC won the UEFA Cup. La Liga became the first league to do the European "double" since 1997. Full article on Wikipedia