Whitley Castle

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Whitley Castle (Epiacum) is a large, unusually shaped Roman fort (Latin: castra) north-west of the town of Alston, Cumbria, England. The castrum, which was first built by the Roman Army early in the 2nd century AD, was partly demolished and rebuilt around 200 AD. It appears to have been sited to protect lead mining in the area as well as to support the border defences of Hadrian's Wall.

Unlike most Roman forts that have a "playing-card shape" (rectangular with rounded corners), Whitley Castle is lozenge-shaped to fit the site. Numerous banks and ditches ring the stone ramparts, making it among the most complex defensive earthworks of any fort known in the Roman Empire.

The site was surveyed by the geologist Thomas Sopwith in the 19th century and the historian R.G. Collingwood in the 20th century. In 2012, a geophysics survey was conducted by a team from Durham University but it has not been fully excavated. Among finds at the fort are altars with inscriptions to Hercules by Legio VI Victrix (normally stationed at Eboracum [York]) and to Apollo by the 2nd Cohort of Nervians, the garrison of auxiliaries. Other finds include a midden containing shoes; coins, fragments of Samian pottery, beads, nails, and a bronze handle shaped like a dolphin.