The fort at Colwyn Castle is thought to represent a Roman auxillary camp established during the Roman thrust through mid-Wales to confine the northern edge of the Silurian territory in the pre-Flavian (pre AD 69) era. A pottery assemblage recovered during excavations demonstrated its continuation as a military site into the early second century.

It is a round angled, rectangular earthwork, 170m north-east to south-west by 160m, its north-east side overlain by earthworks of a medieval castle (Nprn92387). Excavations in 1975 and a watching brief on construction work in 1972 identified pits and possibly burnt timber buildings. No evidence of a vicus has been identified.

Sources: Spurgeon 1974 (AW 14), 20-1 [40];
Spurgeon & Davies 1975 (AW 15), 67 [88];
Musson & Bennison 1982 (AW 22), 29 [37].
Frere 2004 (Britannia 35), 115-120.

J.Wiles 02.02.05