The Odeon of Agrippa was a large ancient concert hall located in the centre of the Agora of Athens. It was built about 15 BC. It was a gift to the people of Athens by Marcus Vipsanius Agrippa, a Roman statesman and general.
The capacity was about 1,000 spectators. The hall was equipped with a raised stage and marble-paved orchestra.
After the roof to collapse in around 150 CE, the Odeon of Agrippa was rebuilt as a half-capacity lecture hall. More elaborate facade was added to the north side. Its massive pillars were carved in the form of ‘giants’ (snake tails) and ‘tritons’ (fish tails).
The Odeon was finally destroyed in 267 CE by the Herulians.