Greece hopes the 2,500-year-old marble fragment, which arrived Monday on loan from an Italian museum, may help resolve one of the world's thorniest cultural heritage disputes and lead to the reunification in Athens of all surviving Parthenon Sculptures — many of which are in the British Museum.Greek Prime Minister Kyriakos Mitsotakis said the Sicilian museum's gesture “opens the way, I believe, for other museums to be able to move in a similar direction.”“Most importantly, of course, the British Museum, which must now realize that it's time for the Parthenon marbles ... to finally return here, to their natural home,” he added, voicing gratitude to Italy for the loan.The fragment was part of a 160-meter-long (520-foot) frieze that ran around the outer walls of the Parthenon Temple on the Acropolis, dedicated to Athena, goddess of wisdom.