Castleshaw Roman fort was a castellum in the Roman province of Britannia. Although there is no evidence to substantiate the claim, it has been suggested that Castleshaw Roman fort is the site of Rigodunum, a Brigantian settlement. The remains of the fort are located on Castle Hill on the eastern side of Castleshaw Valley at the foot of Standedge but overlooking the valley. The hill is on the edge of Castleshaw in Greater Manchester. The fort was constructed in c. AD 79, but fell out of use at some time during the 90s. It was replaced by a smaller fortlet, built in c. 105, around which a civilian settlement grew. It may have served as a logistical and administrative centre, although it was abandoned in the 120s.

The Brigantes were Ancient Britons who in pre-Roman times controlled the largest section of what would become Northern England. Their territory, often referred to as Brigantia, was centred in what was later known as Yorkshire. The Greek geographer Ptolemy named the Brigantes as a people in Ireland also, where they could be found around what is now Wexford, Kilkenny and Waterford, while another people named Brigantii is mentioned by Strabo as a sub-tribe of the Vindelici in the region of the Alps.