Castell Tinboeth lies within a roughly circular Iron Age hillfort and was probably constructed in the late thirteenth century by the powerful Mortimer family. It is mentioned in documents of 1316 and 1322. The surviving remains include a bank, probably representing the remains of a ruinous wall, a ditch and a counterscarp enclosing an egg-shaped area of approximately 45m by 50m. There are traces of a twin-towered gatehouse at the north-eastern point.

J.Wiles, RCAHMW, 02 August 2002