Originally built on seven hills in what is now north-west Jordan, Amman enjoys spectacular views of the surrounding landscape. Excavation has unearthed not only evidence of a neolithic civilization but also artwork dating from the New Stone Age. Conquered by the Assyrians, the Persians, the Greeks and the Romans in turn, the city retains rich evidence of its colourful past, including the Temple of Hercules with three of its columns still intact on Citadel hill. One of the early Byzantine churches from the 4th century AD can also still be visited.