The Agora. Reconstruction of the south side, with Agrippa’s Odeion. The Stoa of Attalos. From 600 BC, the Agora was the centre of Athenian public life. The East Stoa was built by King Attalos of Pergamos in the 2nd century BC and is characteristic of the Agora. It is 116,5m long, 19,4m wide and is decorated with Doric, Ionic and Corinthian columns. The Odeion, a magnificent building with consecutive double rows of covered columns, was built by Agrippas in 15 BC.