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Gelli Garn Ringwork

Also known as, or recorded in historical documents as;
St Mary Hill; Hill House

In the community of Llangan.
In the historic county of Glamorgan.
Modern authority of Vale of Glamorgan.
Preserved county of South Glamorgan.

OS Map Grid Reference: SS96057869
Latitude 51.49764° Longitude -3.49876°

Gelli Garn Ringwork has been described as a certain Timber Castle.

There are earthwork remains.

This site is a scheduled monument protected by law.


A ditch and banked circular enclosure, c.14m internal and 25-6m overall diameter, with a sub-rectangular, ditched and banked enclosure, its N part obscured, c.36m N-S by 27m, on the E; castle thought to have been disused by later 12th C., the land being granted/exchanged with Neath Abbey, 1154-84 (see Nprn18739 - Gelligarn Grange). (Coflein)

A motte with a maximum height of 1.8m surrounded by a ditch 6.0m wide and about 0.7m deep. The top of the mound is 20m flat and defined by a spread bank. (Glamorgan-Gwent Archaeological Trust HER)

The monument comprises the remains of a well preserved castle-ringwork and bailey, which dates to the medieval period (c. AD 1066 - 1485). The ringwork consists of a low mound c. 1m high on the north side and 2m high on the south. It has a low bank all around measuring c. 7m wide with an internal height of 0.5-0.7m. On the north and east sides there is a very shallow ditch. On the south side the ditch is 2m wide and 0.7m deep, with a 6m wide external bank. This ditch and bank continue towards the east and then peter out. In the field to the west of the modern drive a low broad bank 2m high on the lower (south) side and 1m high on the higher (north) side runs westwards to the edge of the field. At its east end it curves round towards the north. (Scheduling Report)

Definitely a small ringwork and bailey and not a motte.
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Sources of information, references and further reading
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This record last updated 06/07/2016 17:23:29