The city was surrounded by fortified earthen ramparts and dry moats. Parts of the central moat and all of the inner moats survive. The Sigiriya rock fortress is surrounded by an extensive network of ramparts and moats. Some moats, walls and ramparts of the castle survive to this day. Castles were surrounded by deep moats, spanned by a single drawbridge. Parts of the moats remain as well as the five bulwarks and the battlements. They also constructed large cult centres surrounded by pales, earthworks and moats. Some of the earliest evidence of moats has been uncovered around ancient Egyptian castles. Japanese castles will have up to three of these concentric moats. Later, the walls of Babylon, reinforced by towers, moats, and ditches, gained a similar reputation. Its complete defences would have included an extensive system of inter-connecting walls, moats, and gatehouses. Each stood on a mound within a figure of eight-shaped system of moats and ditches. Breslau itself was a well-fortified city of walls and moats. In later periods, moats or water defences may be largely ornamental. It has large areas surrounded by walls and moats.