Citadel Battery situated immediately west of the Western Outworks, an extension to the Citadel made in the late 1850s and 1860s, on the prominent east-west ridge of Upper Chalk which dominates the western side of the port and town. It was constructed between 1898 and 1900, to house three 9.2-inch Mark X breech-loading guns, with a primary role of counter bombardment of enemy shipping in the Channel, threatening to shell the port of Dover. commands an extensive view of the seaward approaches to both east and west. To the east, the battery overlooks the port as far as Langdon Cliff. With a range of almost 10 miles, these guns were an important element in the defence of the port and seaway and remained in use until 1956. (location accurate to the nearest 100m based on available information)