In Roman times, Agrippa, the governor of eastern provicies, and friend of emperor Augustus, built a large Odeon, of which portico of giants and tritons is left. After the glory of Atiquity, Athens fell into neglect in middle ages.It was just a small settlement, with Acropolis turned into castle.
In Ancient Agora of Athens, there is a doric, classical temple dedicated to Hephaestos. It is the best preserved ancient temple in Greece. There is also, beside other more damaged monuments, a stoa of Atalos. It is completely restored, and houses an Agora museum. Only one original ionic column is preserved.It can be seen in the staircase.
When in 19th centuary, Athens was appointed capital of newly formed Greek state, houses wre built over Ancient Agora. Theseion escaped the destiny of other monuments beeing converted into cristian shurch. Finally, Americans saved the day. They bought and destroyed the houses, revealing Agora to the world.