The road (path) starting from the entrance of the shrine of Apollo and reaching the altar of the Chiots, is known as Iera Odos (the Sacred Road) in Delphi. It is the path the theoropopi (those who consulted the oracle for a prohecy) followed each time they visited Delphi so they would get priority for Pithia's divination. In order to do this, they first had to make a sacrifice at the altar, which was located at the highest point of the trail. This procedure excluded citizens of the city and some individuals, such as the Korinthians, Naxians, Thebans etc.
Its construction dates bacj to the ancient times, while the road surface you see today is from the early Byzantine era. The trail was uphill and about 200 meters wide and ended in front of the holy altar.
On either side of Iera Odos there are statues and treasuries (buildings containing the cities' offerings) and platforms surround the path acting as souvenirs of a victorious battle or political alliance and offerings to the god for the prophecy or the favor he showed to the town.