The Royal Citadel, Plymouth

The Royal Citadel was built in 1665 as a defence against a threatened Dutch invasion. Today it is the city's main Army headquarters, home to 29 Commando Regiment Royal Artillery. Preston Engineering Survey were commissioned to undertake a topographical survey of the entrance and surrounding area along with front, rear elevations and a cross section of the entrance gate. The resulting survey was then used to draw up plans for a new memorial to pay tribute to Plymouth's Army commandos lost in conflicts since 2000.
Royal Citadel front elevation

Royal Citadel Entrance

Royal Citadel cross section