built of local limestone, while the English Baroque gateway, designed by Sir Thomas Fitz, is of Portland stone. The gateway was originally approached by a drawbridge over a dry moat, but these were removed with all the other outworks in the 1880s. On the opposite bank to Fisher's Nose is the Queen Anne's Battery, dating from 1667. Later use The Royal Citadel was the most important English defence for over 100 years, with 70 ft high walls, and was regularly strengthened over the years, particularly during the 1750s when it was equipped with 113 guns. In 1860, the Royal Commission on the Defence of the United Kingdom recommended the construction of a new ring of forts to defend Plymouth from a greater distance, the "Palmerston Forts"; however, the Citadel was still judged to be '...a valuable support to the works on the right of the "North-Eastern Defences".' During the later Victorian period the Citadel was being used by the Royal Garrison Artillery for instruction. During the Second World War, the Citadel was used as the headquarters of the Coast Artillery Training Centre, Plymouth. After the war, the Coast Artillery School moved there from Great Orme, and the two institutions merged with the one remaining regular coast artillery regiment (47th Coast Regiment), which relocated to Plymouth from Dover to provide a depot establishment for the new Training Centre; training of recruits and others continued until the Coast Artillery was disbanded in 1956. The Royal Citadel is still occupied by the military, being the base of 29 Commando Regiment of the Royal Artillery. This specialist British Army unit provides artillery support to 3 Commando Brigade of the Royal Marines. Guided tours are sometimes available. Immediately to the east of the Citadel, and contemporary with it, a Royal Navy Victualling Yard was established to serve the fleet in Plymouth Sound and Sutton Pool. This closed with the establishment of the Royal William Victualling Yard in the 1830s, since when the area has been used as an extension to the military base (and accommodates vehicles too large to pass through the seventeenth-century gateway). Based units The following notable units are based at Royal Citadel. British Army Royal Artillery 3 Commando Brigade 29th Commando Regiment Future A Better Defence Estate, published in November 2016, indicates that the Ministry of Defence will dispose of the Royal Citadel by 2024. This was later extended to 2035. Garrison