What Middle Eastern capital was once known as Philadelphia?

Amman is the capital and most populous city of Jordan, and the country's economic, political and cultural centre. Situated in north-central Jordan, Amman is the administrative centre of the Amman Governorate. The city has a population of 4,007,526 and a land area of 1,680 square kilometres (648.7 square miles). Today, Amman is considered to be among the most liberal and westernized Arab cities. It is a major tourist destination in the region, particularly among Arab and European tourists.

The earliest evidence of settlement in the area is a Neolithic site known as 'Ain Ghazal. Its successor was known as "Rabbath Ammon", which was the capital of the Ammonites, then as "Philadelphia", and finally as Amman. It was initially built on seven hills but now spans over 19 hills combining 27 districts, which are administered by the Greater Amman Municipality headed by its mayor Yousef Al-Shawarbeh.

Areas of Amman have gained their names from either the hills (Jabal) or the valleys (Wadi) they occupy, such as Jabal Lweibdeh and Wadi Abdoun. East Amman is predominantly filled with historic sites that frequently host cultural activities, while West Amman is more modern and serves as the economic center of the city.