 In March 2011, archaeologists announced that they had discovered five metopes of the Parthenon in the south wall of the Acropolis, which had been extended when the Acropolis was used as a fortress.According to "Eleftherotypia" daily, the archaeologists claimed the metopes had been placed there in the 18th century when the Acropolis wall was being repaired.The experts discovered the metopes while processing 2,250 photos with modern photographic methods, as the white Pentelic marble they are made of differed from the other stone of the wall.