Delphi, on the slopes of Mount Parnassus, had been continuously occupied from the Bronze Age, but the first evidence of a sanctuary there dates to the eighth century BC when dedicatory bronze tripods and votive figurines begin to appear in the archaeological record. In the last quarter of the eighth century, the number of offerings at Delphi significantly increased, and there is evidence that these offerings were beginning to come from across Greece. This pan-Hellenic interest in the sanctuary at Delphi was presumably driven by the development of the oracle there.
Source: Wikipedia
