The fort was first occupied around 90 AD with the construction of a timber and turf fort. A larger stone fort replaced the timber fort during the reign of Hadrian (117-138 AD) and was probably abandoned 138–161 AD.[4]
A late medieval tower house. Tower houses were common in the border regions of northern England and southern Scotland. Arnside tower is an excellent example of a Cumbrian peel tower. .[6][7]
The monument includes Brough Castle and Brough Roman fort. The surviving castle remains are an excellent example of six centuries of continuous improvements. Substantial earthworks of the Roman fort is partially covered by the castle.[9]
The castle's surviving remains include a great keep, a rare double gatehouse and a commanding southwest corner tower, known as the 'Tower of League'.[10]
The monument consists of the surviving remains of the castle's medieval tower keep castle, a section of Carlisle city wall, a 16th century battery, and the underground remains of much of the Roman fort known as Luguvalium.[12]
The monument includes both the above ground and below ground remains of Dalton Castle, which was previously used as the manorial courthouse of Furness Abbey. It was used as a prison from the early 13th century to the late 18th century.[14]
The abbey was established by Stephen, King of England. The surviving remains consist of most of the east end and west tower of the church, the chapter house and the cloister buildings.[15]
The monument includes two Anglian cross shafts and four hogback stones, located in St Andrew's churchyard, Penrith. It also includes a pair of tenth century Anglian crosses. [16]
Founded by Augustinian cannons. What remains of the priory are the ruins of the chancel and transepts, and the 13th-century nave which was converted into a parish church.[18]