Museums in Austria and Greece are discussing the potential return to Athens of two ancient Greek sculptures. The talks announced Tuesday could have a knock-on effect on the world’s biggest cultural heritage dispute — the fate of the British Museum’s Parthenon Sculptures. The museums are discussing two small pieces of the 2,500-year-old marble works from the Acropolis, held in the Austrian capital’s Kunsthistorisches Museum. But if a deal is struck it would increase pressure on the British Museum to return its own much larger collection, among the global debate on cultural restitutions. Austrian’s Foreign Ministry said the two sides were discussing “the possibility of a loan.”