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Cof Cymru: National Historic Assets of Wales · Wales

Caer Dynnaf hillfort

Cowbridge with Llanblethian, Vale of Glamorgan, Wales

A scheduled monument in Cowbridge with Llanblethian, Vale of Glamorgan, recorded as Hillfort (Prehistoric).

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Caer Dynnaf hillfort, Cowbridge with Llanblethian, Vale of Glamorgan, with a pin at the register's coordinates
Ordnance Survey six-inch map, 2nd edition (1888–1913), covering this location. Courtesy of the National Library of Scotland. The pin is ours, placed from the register's coordinates.

The record

Designation
Scheduled monument
Site type
Hillfort
Period
Prehistoric
Community
Cowbridge with Llanblethian
Unitary authority
Vale of Glamorgan
Country
Wales
Coordinates (centre of the scheduled area)
51.45801, -3.46479
SAM number
GM100
Cadw record number
3391

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

David Rumsey Map Collection, Stanford Libraries

5 historical maps cover this location, the earliest the 1636 map "Cornubia : Devonia, Somersetus, Dorcestria, Wiltonia, Glocestria ..." (David Rumsey Map Collection, Stanford Libraries).

Historical maps covering this location

  • 1636 · Cornubia : Devonia, Somersetus, Dorcestria, Wiltonia, Glocestria ... (David Rumsey Map Collection, Stanford Libraries)
  • 1637 · The fourth table of England. Cornub. Devonia, Somerset etc. (David Rumsey Map Collection, Stanford Libraries)
  • 1865 · England and Wales. England No. 6. (David Rumsey Map Collection, Stanford Libraries)
  • 1897 · 262 Pontypridd (Hills) (David Rumsey Map Collection, Stanford Libraries)
  • 1897 · 262 Pontypridd (Outline) (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.

Caer Dynnaf is a fine example of a multivallate mid/late Iron Age hillfort. Its ramparts are well-preserved in places, with those on the west end still retaining much of their original profile. The construction of this hillfort (probably in the latter half of the first millennium BC - sometime between 400 BC and the Roman Conquest in AD 74) represented considerable effort on the part of its builders. The hillfort had great symbolic value, although it may not have been occupied all year round - simply providing refuge in times of strife and a highly visible claim to the land on behalf of the tribe and its chief. A complex and well preserved in-turned entrance is visible on the west side, while internal features such as earthwork banks and platforms indicate the positions of houses, enclosures and tracks. The remains of a medieval masonry structure survive at the east end of the hillfort.

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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