The Parthenon is not built of concrete though nor was it built by the Romans. Rather marble columns on a limestone base. Even so, until the Turks used it as an ammo dump... and a lucky shot by the Venetian navy blew it up the Parthenon was in amazing shape.
Of greater threat to it is Athens' notorious air pollution which is damaging the limestone and marble.
Of greater threat to it is Athens' notorious air pollution which is damaging the limestone and marble.
