sentences:  His head was of a somewhat archaic type; the bust of Zeus found at Otricoli, which used to be regarded as a copy of the head of the Olympian statue, is certainly more than a century later in style.A significant advancement in the knowledge of Phidias' working methodology came during 1954–58 with the excavation of the workshop at Olympia where Phidias created the Statue of Zeus at Olympia.Tools, terracotta molds and a cup inscribed on the bottom "Φειδίου εἰμί" (Pheidíou eimí) – "I belong to Phidias"; literally