Tomenlawddog is a Scheduled Ancient Monument, situated immediately south of St Llawddog's Church (NPRN 310024), and seperated from it only by a road. The earthworks of the medieval motte & bailey castle at include a ditched, steep-sided mound, some 30-32m in diameter, rising 6m to a level summit area, some 10m across. On the west, scarps describe the south & west sides of a rectangular bailey, about 50m square; further scarps observed in the churchyard to the north suggest a further enclosure, or that the western bailey originally extended further to the north. The church and Tomenlawddog are sited some 600m north-north-west of a hill fort, Caer Blaenmaenog (NPRN 303731).

Sources include:
RCAHMW AP965078/42-3

J.Wiles 31.03.05