Acropolis. Athens. Greece. Close up view of iron clamps used to secure slabs together on the world famous icon and landmark of Athens the Parthenon Temple which crowns the Acropolis summit. Ancient Greek builders used double T shaped iron clamps to secure two marble slabs together and then molten lead was poured over the joints for protection. The Parthenon, a temple dedicated to the goddess Athena (Athena Parthenos), was constructed and decorated between 447 and 432 BC. The Parthenon is a Doric style peristyle temple with 17 fluted columns along each side and eight at the ends, which lean slightly inward and bulge out in the centre to cunningly offset the natural optical distortion. The entire Temple, apart from the roof, were of white Pentelic marble with the sculptures that once decorated the pediments, friezes and metopes all being painted in vivid colours. The Parthenon was the centrepiece and jewel of the monumental rebuilding and transformation of the Acropolis during the time of Perikles. The Acropolis of Athens and its monuments are a UNESCO World Heritage Site.