Castell Du, Llanwnnen

Has been described as a Possible Timber Castle (Ringwork)

There are cropmark/slight earthwork remains

NameCastell Du, Llanwnnen
Alternative NamesLlanwnen, Castell Ddu
Historic CountryCardiganshire
Modern AuthorityCeredigion
1974 AuthorityDyfed

A D-shaped enclosure, about 24m north-south by 18m, resting on steep natural scarps above the valley of the Grannell on the east, defined elsewhere by massive banks, up to 4.2m high, having a centrally placed west-facing entrance set at the point of the D; a possible building platform occupies the northern part of the enclosure; there are no indications of ditches, or further works, although OS County series (Cardigan. XLI.3 1889) shows a fragment of bank some 60m to the north, by the modern road: the place-name 'Castell Ddu' occurs some 350m to the south-west. (Coflein)

The monument comprises the remains of a well preserved castle-ringwork, which dates to the early part of the medieval period (c. AD 1066 - 1485). The monument consists of a semi circular earthwork built on the edge of a steep drop to the river. It is c.18m in diameter, the defences being on the west side and reaching c.2.5m above the interior and c.4.5m above the exterior. There are slight indications of a ditch on the north side in the neighbouring field. (Scheduling Report)

This site is a scheduled monument protected by law

Not Listed

The National Monument Record (Coflein) number(s)
County Historic Environment Record
OS Map Grid ReferenceSN533471
HyperLink HyperLink HyperLink

No photos available. If you can provide pictures please contact Castlefacts

Most of the sites or buildings recorded in this web site are NOT open to the public and permission to visit a site must always be sought from the landowner or tenant.

Calculate Print


  • Morgan, Gerald, 2008, Castles in Wales: A Handbook (Talybont: Y Lolfa Cyf.) p. 234 (listed)
  • Davis, Paul, 2000, A Company of Forts. A Guide to the Medieval Castles of West Wales (Gomer Press) p. 36
  • Salter, Mike, 1996, The Castles of South West Wales (Malvern) p. 46 (slight)
  • King, D.J.C., 1983, Castellarium Anglicanum (London: Kraus) Vol. 1 p. 47


  • King, D.J.C. and Alcock, L., 1969, 'Ringworks in England and Wales' Ch√Ęteau Gaillard Vol. 3 p. 90-127
  • Hogg, A.H.A. and King, D.J.C., 1963, 'Early castles in Wales and the Marches: a preliminary list' Archaeologia Cambrensis Vol. 112 p. 77-124
  • King, D.J.C., 1956, 'The Castles of Cardiganshire' Ceredigion Vol. 3 p. 64-5 no. 24 online copy
  • Evans, D.C., 1933, 'Cribyn Clottas. some hill-top camps' Journal of the Cardiganshire Antiquarian Society Vol. 9 p. 25 online copy