Clyro Roman fort is a large, 370m by 250m, Roman military enclosure. A trial excavation in1964 (Jarrett 1969, 77-9) indicated two phases of defences, and exclusively pre-Flavian (pre-69AD) occupation. The evaluation of aerial photographs indicates that the south-western defences lie about 30m to the north-east of the published line (Nash 1999). The nature of the fort is not completely understood - it is assumed to be a semi-permanent base because no evidence of structures other than ovens and a metalled road were identified in 1964, although the recent discovery of the base of a 'donkey mill' may suggest that a more permanent base was originally intended. A possible temporary camp has been noted from the air to the west (NPRN 308246).

Sources: St Joseph 1958 (JRS48), 86-101 - 95;
Jarrett 1969 (Roman Frontier in Wales, 2nd ed.), 77-80;
Nash 1999 (AW39), 106-7.

J.Wiles, RCAHMW, 04 September 2002