The remains of Penmark Castle consist of two enclosures resting on natural scarps on the north and east. A sub-oval inner enclosure, c.58m east to west by 40m, is defined by the remains of a stone curtain, with one tower and indications of a second. Within are traces of buildings, with a ruined barn of c.1770.

The sub-rectanular outer enclosure on the west is around 50m east to west by 60m. It is defined by a bank and ditch on the west and rests on the churchyard on the south (see NPRN 301269). There are remains of a c.6.0m diameter dove cote at the north-west angle.

The castle thought to be early twelfth century in origin,but is first mentioned in documents in 1307. It is recorded as ruinous by 1622.
source: RCAHMW 2000, 279-285

J.Wiles, RCAHMW, 21 January 2003