Petra is a famous city carved out of stone, hidden by towering sandstone mountains in Jordan. It was an important city, and was the main city of an ancient people called the Nabataens, who lived in southern Jordan, Canaan and the northern part of Arabia, and created a kingdom with its capital at Petra. Lying in the centre of an ancient caravan trade routes, Petra benefited from the resulting commerce. Caravans pass through Petra for Giza in the south, Bosra and Damascus in the north, Aqaba on the Red Sea, and eastward to the Persian Gulf.Until they settled at Petra, the Nabateans were largely nomadic. They founded Petra around the 6th century BC and ruled over it until AD 100, when the Romans conquered Petra. In AD 106 it was absorbed into the Roman Empire and was known as Arabia Petraea.