Despite waging a high-profile campaign for their return, Greece will not take legal action against the UK over the repatriation of the Elgin Marbles, the Parthenon's famous sculptural frieze.

About 30 percent of the marbles reside at the British Museum. They were acquired 200 years ago by Lord Elgin when Greece was ruled under the Ottoman Empire. Greece maintains that the acquisition was illegal.

The country did not follow the advice of lawyer Amal Clooney, who had urged Greece to take Britain to the International Court of Justice, and had written a 150-page report that began with a formal request for the marbles.

Greece's culture minister Nikos Xydakis told the country's Mega TV: "One cannot go to court over whatever issue. Besides, in international courts the outcome is uncertain." He added that Greece would pursue "diplomatic and political" action for their return.