Sport Lisboa e Benfica , commonly known as Benfica, is a sports club based in Lisbon, Portugal. It is best known for the professional football team playing in the Primeira Liga, the top flight of the Portuguese football league system, where they are the most successful club in terms of titles won. Founded on 28 February 1904 as Sport Lisboa, Benfica is one of the "Big Three" clubs in Portugal that have never been relegated from the Primeira Liga, along with rivals Sporting CP and FC Porto. The Benfica team is nicknamed Águias (Eagles), for the symbol atop the club's crest, and Encarnados (Reds), for the shirt colour.