Panathinaikos Athlitikos Omilos, also known simply as Panathinaikós, is a major Greek multi-sport club based in the City of Athens. Panathinaikos is one of the most successful multi-sport clubs and one of the oldest clubs in Greece. The name "Panathinaikos" was inspired by the ancient work of Isocrates Panathenaicus, where the orator praise the Athenians for their democratic education and their military superiority, which use it for benefit of all Greeks.

Giorgos Kalafatis was a Greek football pioneer, player, coach, track and field athlete and the founder of Panathinaikos Athens multi-sports club.