The Campeonato Nacional de Liga de Primera División, commonly known as the Primera División or La Liga and officially known as LaLiga EA Sports for sponsorship reasons, is a professional association football league in Spain and the highest level of the Spanish football league system. It is controlled by the Liga Nacional de Fútbol Profesional and it is contested by 20 teams over a 38-matchday period. Since its inception, 62 teams have competed in La Liga. Nine teams have been crowned champions, with Barcelona winning the inaugural La Liga and Real Madrid winning the title a record 36 times. Real Madrid are also the most recent winners, having won the 2023–24 edition. During the 1940s Valencia, Atlético Madrid and Barcelona emerged as the strongest clubs, winning several titles. Real Madrid and Barcelona dominated the championship in the 1950s, each winning four La Liga titles during the decade. During the 1960s and 1970s, Real Madrid dominated La Liga, winning fourteen titles, with Atlético Madrid winning four. During the 1980s and 1990s Real Madrid were prominent in La Liga, but the Basque clubs of Athletic Bilbao and Real Sociedad had their share of success, each winning two Liga titles. From the 1990s onward, Barcelona has dominated La Liga, winning seventeen titles to date. Although Real Madrid has also been prominent, winning eleven titles, La Liga has also seen other champions, including Valencia and Deportivo La Coruña.