Panathinaikos Football Club (Greek: Π.Α.Ε. Παναθηναϊκός), is a Greek professional football club based in Athens. Founded in 1908, they play in the Super League Greece and are one of the oldest clubs in Greek football history. They have won 20 Greek championship titles and 17 Greek Cups.
Panathinaikos is the most successful greek club in terms of achievements in European competitions . They have reached the Champions League final in 1971 ( former European champions' club cup), the semi-finals twice (1985,1996), and in 1971 , they lost to Nacional Montevideo for the Intercontinental Cup (1-1 in Greece, 1-2 in Uruguay), in which they played due to Ajax's absence. However, Panathinaikos is the second most successful regarding the titles conquered in Greek competitions.
Panathinaikos FC is the football department of Panathinaikos Athlitikos Omilos multi-sport club (Παναθηναϊκός Αθλητικός Όμιλος), the Pan-Athenian Athletic Club, from which the club's other name, P.A.O., derives. In 1979, the department became professional and independent. They have played their home games in a number of fields, most significantly in Apostolos Nikolaidis Stadium, which is considered as their traditional home stadium, and in Athens Olympic Stadium. In 2008, the club announced the signing of a contract for the construction of its new stadium, Marfin Stadium, the project has yet to begin.
Source : WIkipedia.com