AEK Athens

A.E.K. Football Club (Greek: Αθλητική Ένωσις Κωνσταντινουπόλεως, romanized: Athlitiki Enosis Konstantinoupoleos, lit. 'Athletic Union of Constantinople'), known simply as A.E.K. (Greek: A.E.K.; ) in Greece and AEK Athens internationally, is a Greek professional football club based in Nea Filadelfeia, Attica, Greece.

Established in Athens by Greek refugees from Constantinople in the wake of the Greco-Turkish War (1919–1922), AEK is one of the most successful teams in Greek football, by winning 32 national titles it is the only club to have won all the competitions organised by the Hellenic Football Federation (13 Greek Championships, 16 Greek Cups, 1 League Cup and 2 Super Cups).

The club has appeared several times in European competitions (UEFA Champions League, UEFA Europa League, and the defunct UEFA Cup Winners' Cup). It is the only Greek team to have advanced to the semi-finals of the UEFA Cup (1976-77) and the quarter-finals of the UEFA Cup Winners' Cup twice (1996-97 and 1997-98).

AEK was also the first Greek team to reach the quarter-finals of the European Cup (1968–69) and to qualify for the group stage of the UEFA Champions League (1994-95).