Designed by Phidias and carved by a team of anonymous masons, the frieze adorned the temple of Athena on the Acropolis and represents a festival procession in honour of the Olympian gods.
"Periodically, the question of where the surviving sculptures from the Parthenon should now be displayed becomes a subject of public discussion." -- The British Museum
Read all about this discussion at http://www.britishmuseum.org/gr/debate.html