Triangulation Pillar

The triangulation pillar, built around 1936, is located on Bulford Beacon Hill. It stands within an enclosure at the gun end of the original Principal Triangulation established in 1794. The pillar is made of concrete and has a square cone shape, topped with a bronze tripod base and featuring a benchmark on its side, at a height of 204 meters. The original triangulation point consists of an iron cannon set vertically 3 meters into the ground, with its muzzle filled, marking the north-east corner of the primary survey triangle for western England. This point is further protected by a 1.9-meter concrete kerb in the shape of a chamfered square, all situated within a triangular earthwork that includes a 2-meter-wide ditch. The triangulation point is 36,574 feet from the southern point near Old Sarum.