Bath's city walls (also referred to as borough walls) were a sequence of defensive structures built around the city of Bath in England. Roman in origin, then restored by the Anglo-Saxons, and later strengthened in the High medieval period, the walls formed a complete circuit, covering the historic core of the modern city, an area of approximately 23 acres (9.3 ha) including the Roman Baths and medieval Bath Abbey. In the present-day however, the walls have largely disappeared, though the route they took is evident from the street layout; one of the gates partially remains.