Its successor was known as "Rabbath Ammon", which was the capital of the Ammonites, then as "Philadelphia", and finally as Amman.
Its houses were rectangular mud-bricked buildings that included a main square living room, whose walls were made up of lime plaster.
The site was discovered in 1974 as construction workers were working on a road crossing the area.
By 1982 when the excavations started, around 600 meters (2,000 feet) of road ran through the site.
In the northern modern-day Jordan, the Greek cities of Philadelphia (Amman), Gerasa, Gedara, Pella and Arbila joined with other cities in Palestine and Syria; Scythopolis, Hippos, Capitolias, Canatha and Damascus to form the Decapolis League, a fabled confederation linked by bonds of economic and cultural interest.
Philadelphia became a point along a road stretching from Ailah to Damascus that was built by Emperor Trajan in 106 AD.One of the most original monuments in Jordan, and perhaps in the Hellenistic period in the Near East, is the village of Iraq Al-Amir in the valley of Wadi Al-Sir, southwest of Amman, which is home to Qasr Al-Abd (Castle of the Slave).