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.