A sprawling city spread over 19 hills, or “jebels,” Amman is the modern – as well as the ancient – capital of the Hashemite Kingdom of Jordan. Known as Rabbath-Ammon during the Iron Age and later as Philadelphia, the ancient city that was once part of the Decapolis league, now boasts a population of around 2.3 million people. Amman, often referred to as the white city due to its low size canvas of stone houses, offers a variety of historical sites. There are a number of renovations and excavations taking place that have revealed remains from the Neolithic period, as well as from the Hellenestic and late Roman to Arab Islamic Ages. The site which is known as the Citadel includes many structures such as the Temple of Hercules, the Umayyad Palace and the Byzantine Church. At the foot of the Citadel lies the 6,000 seat Roman Theatre, which is a deep-sided bowl carved into the hill and is still being used for cultural events. Another newly restored theatre is the 500-seat Odeon that is used for concerts. The three museums found in the area offer a glimpse of history and culture; they are the Jordan Archaeological Museum, The Folklore Museum and the Museum of Popular Traditions.