Palaestra
Vitruvius describes single colonnades on three sides of the yard and a double colonnade on the north side. This double colonnade would protect the room behind it from sun and rain. The palaestra was a place for training the body and the mind. This room was the ephebeion. It was here that young men (ephebes) would receive instruction on Greek culture. Stone benches would have been set into the walls.