This hill is the famous Cronion, sacred to Cronus, the father of Zeus.
This covering had been formed, during some twelve centuries, partly by clay swept down from the Cronion, partly by deposit from the overflowings of the Cladeus.
- If the northern limit of the Altis, like the west, south and east, had been traced by a boundary wall, this would have had the effect of excluding from the precinct a spot so sacred as the Cronion, " Hill of Cronus," inseparably associated with the oldest worship of Zeus at Olympia.
But the line which such a boundary would have followed is partly represented by the remains of a wall running from east to west immediately north of the treasure-houses (see below), which it was designed to protect against the descent of earth from the Cronion just above.
The twelve Treasure-houses on the north side of the Altis, immediately under the Cronion, belong to this class.
157, since it caused a deflexion in the watercourse along the base of the Cronion constructed by Herodes Atticus.