Map Reference SO32SW
Grid Reference SO32102303
Unitary (Local) Authority Monmouthshire
Old County Monmouthshire
Type of Site HILLFORT
Broad Class DEFENCE
Period Iron Age
Site Description Pentwyn defended enclosure is located on a narrow neck of rough pasture moorland on the south-eastern margins of the Black Mountains. It consists of two conjoining enclosures flanked by farmland on the south-west and steep natural slopes to the north-east. A subrectangular enclosure measuring about 140m by 70m, defined by a bank and ditch has a south-east entrance that opens into a sub-oval area measuring about 185m by 104m. The defences are multivallate aside from the more naturally defended north-east side.
OS record card SO32SW6.
RCAHMW air photos: 945074/42-3.
D.Leighton & J.Wiles, RCAHMW, 7 April 2016