Jaisalmer Fort is one of the largest fully preserved fortified cities in the world. It is situated in the city of Jaisalmer, in the Indian state of Rajasthan. It is a World Heritage Site. It was built in 1156 AD by the Rajput ruler Rawal Jaisal, from whom it derives its name. The fort stands amidst the sandy expanse of the great Thar Desert, on Trikuta Hill. Before the days of the British Raj, the fortress city served as a refuge and way-station for caravans and travelers along the Silk Road. Its ramparts served as the backdrop for many battles in past centuries when the Silk Road still served as one of the main trade routes between East and West.