A.E.K Basketball Club (Greek: Αθλητική Ένωσις Κωνσταντινουπόλεως, Athlitiki Enosis Constantinoupoleos, means Athletic Union of Constantinople), also known simply as AEK BC (Greek: Α.Ε.Κ. Κ.Α.Ε.) or AEK, known in European competitions as AEK Athens, is a Greek professional sports basketball club based in Athens, Greece, part of the major multi-sport club A.