Altis was a location in what is today Peloponnese, Greece, on a little plain in Elis, on the right shore of the Alfeios River near the city of Pyrgos, around 18 kilometers away from the Ionian Sea and at the foot of Mount Cronion.
At first, it was a sacred of people where magnificent trees grew and within which, hidden in the center, was the Sanctuary of Zeus. Olympia was built on this site.