Hephaestus was the patron god of metal working, craftsmanship, and fire. There were numerous potters' workshops and metal-working shops in the vicinity of the temple, as befits the temple's honoree. Archaeological evidence suggests that there was no earlier building on the site except for a small sanctuary that was burned during the Second Persian invasion of Greece in 480 BC. The name "Theseion" or Temple of Theseus was attributed to the monument in modern times under the mistaken assumption that it housed the remains of the Athenian hero Theseus, brought back to the city from the island of Skyros by Kimon in 475 BC, but refuted after inscriptions from within the temple associated it firmly with Hephaestus.