Sport Lisboa e Benfica, commonly known as Benfica, is a professional football club based in Lisbon, Portugal, that competes in the Primeira Liga, the top flight of Portuguese football. Founded on 28 February 1904 as Sport Lisboa, Benfica is one of the "Big Three" clubs in Portugal that have never been relegated from Primeira Liga, along with rivals Sporting CP and FC Porto. Benfica are nicknamed As Águias (The Eagles), for the symbol atop the club's crest, and Os Encarnados (The Reds), for the shirt colour. Since 2003, their home ground has been the Estádio da Luz. Benfica is the most supported Portuguese club and the European club with the highest percentage of supporters in its own country, having an estimated 14 million supporters worldwide. Competitively, with 84 major trophies won, Benfica is the most decorated club in Portugal.