 Roman rule in Jordan left several ruins across the country, some of which exist in Amman, such as the Temple of Hercules at the Amman Citadel, the Roman Theatre, the Odeon, and the Nymphaeum. The two theatres and the Nymphaeum fountain were built during the reign of Emperor Antoninus Pius around 161 AD. The theatre was the larger venue of the two and had a capacity for 6,000 attendees. It was oriented north and built into the hillside, to protect the audience from the sun. To the northeast of the theatre was a small odeon. Built at roughly the same time as the theatre, the Odeon had 500 seats and is still in use today for music concerts. Archaeologists speculate that the structure was originally covered with a wooden roof to shield the audience from the weather. The Nymphaeum is situated southwest of the Odeon and served as Philadelphia's chief fountain. The Nymphaeum is believed to have contained a 600-square meter pool which was three meters deep and was continuously refilled with water.
