Olympiacos Football Club ( Greek : ΠΑΕ Ολυμπιακός Σ.Φ.Π. [olibiaˈkos] ), known simply as Olympiacos or Olympiacos Piraeus , are a Greek professional football club based in Piraeus . Part of the major multi-sport club Olympiacos CFP ( Greek : Ολυμπιακός Σύνδεσμος Φιλάθλων Πειραιώς , Olympiakós Sýndesmos Filáthlon Peiraiós , lit. ' Olympic Association of Friends-of-sports of Piraeus ' ), their name was inspired by the ancient Olympic Games and along with the club's emblem, the laurel-crowned Olympic athlete, symbolise the Olympic ideals of ancient Greece . [ 3 ] Their home ground is the Karaiskakis Stadium , a 33,334-capacity stadium in Piraeus. [ 4 ]