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Cof Cymru: National Historic Assets of Wales · Wales

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St. Nicholas and Bonvilston, Vale of Glamorgan, Wales

The record

Designation
Scheduled monument
Site type
Ringwork
Period
Prehistoric
Community
St. Nicholas and Bonvilston
Unitary authority
Vale of Glamorgan
Country
Wales
Coordinates (centre of the scheduled area)
51.46389, -3.34954
SAM number
GM079
Cadw record number
408

Slide toward Today to fade the historical sheet and see the modern map underneath.

David Rumsey Map Collection, Stanford Libraries

Shown on 5 historical map sheets, the earliest the 1636 "Cornubia : Devonia, Somersetus, Dorcestria, Wiltonia, Glocestria ..." (David Rumsey Map Collection, Stanford Libraries).

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This record in Cadw's own full report ↗

Cadw's description

The following provides a general description of the Scheduled Ancient Monument.

The monument comprises the remains of an Iron Age (800BC-AD74) defended enclosure. It consists of two oval concentric enclosures, separated by a space of approximately 10m. The inner enclosure measures 65m long from east to west by 50m, the outer measures 120m long by about 105m.

Each enclosure is defended by a single bank which has been reduced to a scarp except on the eastern and western sides of the inner circuit and on the north-west of the outer circuit. The banks are 10.5 to 12m wide. The internal height of the banks is slight except on the north-west of the outer circuit where it reaches 1.5m. The external bank height averages nearly 2.5m. A shallow external ditch 6-9m wide is visible along part of the western side. The entrance through both ramparts is on the north; the inner entrance appears to be slightly in-turned but its western side is disturbed. A stony hollow at the centre of the enclosures is probably the site of a building which is shown on the Ordnance Survey map of 1813.

The monument is of national importance for its potential to enhance our knowledge of late prehistoric defensive organisation. The monument forms an important element within the wider Iron Age context and may be expected to contain archaeological information in regard to elements such as chronology, building techniques and social organisation.

The scheduled area comprises the remains described and areas around them which related evidence may be expected to survive.

Nearby in the register

Other entries of the same register within about three miles of this one, by straight line.

Designated Historic Asset GIS Data, The Welsh Historic Environment Service (Cadw), 2026-09-07, licensed under the Open Government Licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ Cadw, the Welsh Historic Environment Service · Open Government Licence v3.0
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