Panathinaikos Football Club (Greek: ΠΑΕ Παναθηναϊκός Α.Ο. [panaθinaiˈkos] ), known as Panathinaikos, or by its full name, and the name of its parent sports club, Panathinaikos A.O. or PAO (Παναθηναϊκός Αθλητικός Όμιλος; Panathinaïkós Athlitikós Ómilos, lit. 'Pan-Athenian Athletic Club'), is a Greek professional football club based in Athens, Greece.
Panathinaikos was founded in 1908 as "Podosfairikos Omilos Athinon" (Football Club of Athens) by Giorgos Kalafatis. They play in Super League Greece, being one of the most successful clubs in Greek football and one of the three clubs which have never been relegated from the top division. Among their major titles are 20 Greek Championships, 20 Greek Cups, achieving eight times the Double and 3 Greek Super Cups. They are also one of three clubs to win a Greek championship undefeated, going without a loss in a top-flight campaign in the 1963–64 season. Panathinaikos is the only Greek team that has reached the UEFA Champions League final in 1971 (which they lost to Ajax 2–0), and also the semi-finals twice, in 1985 and 1996. It is also the only Greek team that has played for the Intercontinental Cup (1971). Furthermore, they have reached the quarter-finals of the Champions League on another two occasions (in 1992 and 2002), as well as the quarter-finals of the UEFA Cup twice (1988 and 2003). They have also won the Balkans Cup in 1977. According to research and polls, Panathinaikos is the second most popular football team in Greece. Panathinaikos is also a member of the European Club Association.
