Lleiniog near Penmon

Has been described as a Possible Timber Castle (Motte)

There are earthwork remains

NameLleiniog near Penmon
Alternative Names
Historic CountryAnglesey
Modern AuthorityAnglesey
1974 AuthorityGwynedd

This appears to be a castle mount set on the foreshore at the mounth of the Lleiniog river some 500m east of the more massive Castell Aberlleiniog (NPRN 58448). A roughly circular steep sided mound, some 11m across and up to 3.4m high. It rises above the beach and a small coastal lagoon, except on the north-east where it is joined to the maine. A ditch cuts across this neck whilst above an arc of bank or rampart, shields the 10m diameter summit. This is evidently a fortification, even if the mound itself is partly natural. It is possible that it was an outpost of the seventeenth century fort at Castell Aberlleiniog, although its form appears to be medieval. The mound was involved in the landscaped grounds of the sixteenth century and later Lleiniog mansion (NPRN 300310). (Coflein–John Wiles 17.07.07)

Not scheduled

Not Listed

The National Monument Record (Coflein) number(s)
County Historic Environment Record
OS Map Grid ReferenceSH621791
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Copyright Dave Barlow of Abaroths World All Rights Reserved
Copyright Dave Barlow of Abaroths World All Rights Reserved
Copyright Dave Barlow of Abaroths World All Rights Reserved

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  • King, D.J.C., 1983, Castellarium Anglicanum (London: Kraus) Vol. 1 p. 3
  • RCAHMW, 1937, An inventory of the ancient monuments in Anglesey (HMSO) p. 125 no. 6 online copy
  • Lewis, Samual, 1849, A Topographical Dictionary of Wales online copy


  • Lynch Llewellyn, F., 2010, 'Notes on a small mound or motte at the mouth of the Afon Lleiniog' Anglesey Antiquarian Society and Field Club Transcactions p. 110-13
  • Renn, D.F., 1959, 'Mottes: a classification' Antiquity Vol. 33 p. 106-12 (listed as precussor to Castell Aberlleiniog)