Caersws Roman Forts

[1] The original Latin names of these encampments are unknown, although their placement has led to tentative identification with the "Mediolanum" among the Ordovices described in Ptolemy's Geography and the "Mediomanum" of the Ravenna Cosmography.

[2] Mediomanum is an unusual and otherwise unattested name (literally "Central Hand"), suggesting it may be a scribal error.

[5] If Caersws were the location of Ptolemy's Mediolanum, it might be identical with the Cair Meguaid listed by among the 28 cities of Britain in the History of the Britons,[6] although this is more often identified with the Powysian court at Meifod.

Three parallel lines of surviving defence (ditches) have been identified with an entrance way in the centre with an outer earthwork.

The fort, which was built closer to the confluence of the Rivers Carno and Severn, is now beneath the present-day village of Caersws.