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Cof Cymru: National Historic Assets of Wales · Wales

Old Dynevor Castle

Llandeilo, Carmarthenshire, Wales

The record

Designation
Listed building, Grade I
Broad class
Defence
Date of designation
8 July 1966
Community
Llandeilo
Unitary authority
Carmarthenshire
Country
Wales
Coordinates
51.87680, -4.01849
Cadw reference
11117

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

Set high on a rocky, wooded ridge above Afon Tywi with exceptional, picturesque views to the castle from S over the river and from the landscaped park to N.

Extensive remains of a medieval castle first built by the Welsh princes in C13; partly remodelled by King Edward I with a gatehouse added on S and a rectanuglar tower on N. Late C15 additions by Sir Rhys ap Thomas.

The masonry remains include an angular curtain wall, incorporating a circular tower to NW and a large round tower at SE angle, now surmounted by a C17(?)/C18 gazebo. Later additions include a rectangular hall facing N.

Old Dynevor Castle became a major feature in the C18 landscaped park to Newton House (now Plas Dinefwr) situated approximately one kilometre to N.

Scheduled Ancient Monument: Cm29.

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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