BOULEUTÊRION
By taking the direction of the east of the sanctuary to reach the south of the temple of Zeus lies the bouleutêrion, seat of the Olympic Council. They also retained important writings and decrees. The building consists of two ailes wings, both north and south, built at different times. Between these two wings, in an open square space was the altar of Zeus bearing a statue of God holding lightning. By continuing to the east, you may see the foundations of Nero's arc of triumph. In Roman times, the procession entered the Altis by passing under that arc.
Going to the north, you can go to the Echo portal. It was called so because it was claimed that the sound of the voice was repeated seven times. He was decorated with rich paintings and ornaments, works of the greatest artists of the time.