The city formerly known as Philadelphia is now called AMMAN, which is a five-letter word. AMMAN is the capital and largest city of Jordan, located in the Middle East. It was founded in the 18th century BC and has been continuously inhabited since then. The city has a rich history, having been ruled by various empires throughout its existence. It was known as Philadelphia during the Roman period, and was later renamed AMMAN by the Umayyad Caliphate in the 7th century AD.