The Campeonato Nacional de Liga de Primera División, commonly known simply as Primera División in Spain, and as La Liga in English-speaking countries and officially as LaLiga Santander for sponsorship reasons, stylized as LaLiga, is the men’s top professional football division of the Spanish football league system. Administered by the Liga Nacional de Fútbol Profesional, it is contested by 20 teams, with the three lowest-placed teams at the end of each season being relegated to the Segunda División and replaced by the top two teams and a play-off winner in that division. Since its inception, a total of 62 teams have competed in La Liga. Nine teams have been crowned champions, with FC Barcelona winning the inaugural La Liga and Real Madrid winning the title a record 35 times. During the 1940s Valencia, Atlético Madrid and Barcelona emerged as the strongest clubs, winning several titles.