“The Primeira Liga ([pɾiˈmɐjɾɐ ˈliɣɐ]; English: Premier League), also known as Liga Portugal Bwin for sponsorship reasons, is the top professional association football division of the Portuguese football league system. It is organised and supervised by the Liga Portuguesa de Futebol Profissional, also known as Liga Portugal. As of the 2014–15 season, the Primeira Liga is contested by 18 teams, with the three lowest placed teams relegated to the LigaPro and replaced by the top-three non-reserve teams from this division. Founded in 1934 as an experimental (now official) league called Campeonato da Liga da Primeira Divisão, it was named Campeonato Nacional da Primeira Divisão from 1938 until 1999, when it was changed to its current naming. Over 70 teams have competed in the Primeira Liga, but only five have been crowned champions. Among them, the ‘Big Three‘ teams – Benfica (37 wins), Porto (29 wins) and Sporting CP (19 wins) – have won all but two Primeira Liga titles; the other winners are Belenenses (1945–46) and Boavista (2000–01). …”
Wikipedia