The Temple of Apollo, god of music, harmony, light, healing, and oracles occupied the most important and prominent position in the Delphic Panhellenic Sanctuary. The edifice with the partially restored colonnade visible today dates to the 4th century BC; it is the third temple built at the same place. The famous oracle, the Pythia, operated inside the temple, the location chosen, according to one tradition, due to a sacred chasm beneath the site emitting vapors, which were inhaled by the Pythia. Some ancient writers state that the Pythia then entered a state of delirium and uttering inarticulate cries, which were then turned into equivocal oracles by the priests. This interpretation is controversial, and has been challenged by scholars such as Joseph Fontenrose and Lisa Maurizio, who argue that the ancient sources uniformly represent the Pythia speaking intelligibly, and giving prophecies in her own voice.