The Nymphaeum was built in the 2nd century CE, during the same period as the nearby theatre and odeon.

The Nymphaeum is a partially preserved Roman public fountain in Amman, Jordan. It is located a short distance from the Hashemite Plaza, the Roman Theater and the Odeon, at the crossing of Ibn al-Atheer and Quraysh streets in al-Balad. Such fountains were very popular in Roman cities, and Philadelphia, as Amman was known by ancient Greeks and Romans, was no exception. This nymphaeum is believed to have contained a 600 square meters pool which was three meters deep and was continuously refilled with water.