Ictinus and Callicrates, the architects of the Parthenon, used subtle curves in the columns and bases to correct the distortions caused by perspective. The Parthenon housed the gold and ivory statue of Athena, created by Phidias, which was one of the Seven Wonders of the Ancient World. The temple contains many symbols related to the religious and political life of ancient Athens. The sculptural depictions of the Virgin and the gods provide insights into the beliefs and festivals of the time. Inscriptions and other details found on the interior and exterior surfaces of the Parthenon offer information about the rituals and offerings made there. The Parthenon features complex geometric designs that combine art and science, with techniques that still impress today for their precision and innovation.