Hyampeia is a mountain peak above the Castalian Spring

Castalian Spring

The Castalian Spring, in the ravine between the Phaedriades at Delphi, is where all visitors to Delphi — the contestants in the Pythian Games, and especially suppliants who came to consult the Delphic Oracle — stopped to wash their hair; and where Roman poets came to receive poetic...

 in Delphi

Delphi

Delphi is both an archaeological site and a modern town in Greece on the south-western spur of Mount Parnassus in the valley of Phocis.In Greek mythology, Delphi was the site of the Delphic oracle, the most important oracle in the classical Greek world, and a major site for the worship of the god...

, Greece. Its modern name is Flemboukos. It is the eastern peak of the Phaedriades

Phaedriades

In Greece, the Phaedriades were the pair of cliffs, ca 700 m high on the lower southern slope of Mt. Parnassos, which enclose the sacred site of Delphi, the center of the Hellenic world...

, the western peak was known as Nauplia. According to Herodotus

Herodotus

Herodotus was an ancient Greek historian who was born in Halicarnassus, Caria and lived in the 5th century BC . He has been called the "Father of History", and was the first historian known to collect his materials systematically, test their accuracy to a certain extent and arrange them in a...

, there was a sacred precinct at the foot of Hyampeia dedicated to the Delphic hero Autonous at the time of the Persian Wars

Greco-Persian Wars

The Greco-Persian Wars were a series of conflicts between the Achaemenid Empire of Persia and city-states of the Hellenic world that started in 499 BC and lasted until 449 BC. The collision between the fractious political world of the Greeks and the enormous empire of the Persians began when Cyrus...

. A battle between the Delphians and the Persians took place here during that war in which the Delphians won and prevented the Persians from looting Delphi.