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Certain |
Probable |
Questionable or Doubtful |
Rejected |
|
Confidence is a statement of the site as a medieval fortification or palace | ||||
Name |
Alternative Name(s) |
Type |
Remains |
| Aber Castle - Pen-y-Mwd and Ty'n-y-Mwd llys | Abermenai; Mwd Castle; Abergwyngregyn; Llan Boduan; Bangor | Timber Castle, Palace | earthwork |
| Bangor Bishops Palace | Palace | masonry ruins/remnants | |
| Bangor Castle | Timber Castle | no visible | |
| Bangor Town Defences | Urban Defence | no visible | Bon y Dom | Timber Castle | no visible |
| Braich y Dinas | Timber Castle | earthwork | Bryn Castell, Caerhun | Tal Y Cafn; Castell Maelgwn | Timber Castle, Palace | earthwork |
| Caernarfon Castle | Caernarvon; Carnarvon | Timber Castle, Masonry Castle, Palace | major building | Caernarfon manor of Bishop of Bangor | Palace | no visible |
| Caernarfon Town Walls | Caernarvon; Kairarvon | Urban Defence | major building |
| Carn Fadryn | Garn Fadryn; Carn Fadrun; Madryn; Garn Fadrun | Timber Castle, Masonry Castle | masonry ruins/remnants | Castell Abersoch | Castell Aber-Soch; Hen Gaer; Castellmarch | Timber Castle | cropmark/slight earthwork |
| Castell Llanddeiniolen | Tymawr | Timber Castle | cropmark/slight earthwork | Castell Pen y Garn, Prenteg | Masonry Castle | no visible |
| Conwy Castle | Conway; Aberconwy | Masonry Castle, Palace | major building |
| Conwy Town Walls | Conway; Aberconwy | Urban Defence | major building |
| Criccieth Castle | Cricieth | Masonry Castle | major building |
| Degannwy Castle | Castle of Gannoc; Gannock; Dagaunoth; Deganwy; Hegannow | Timber Castle, Masonry Castle | masonry footings |
| Degannwy Town Defences | Gannoc | Urban Defence | no visible |
| Dinas Emrys Castle | Timber Castle, Masonry Castle, Palace | masonry footings | |
| Dolbadarn Castle | Masonry Castle | major building | |
| Dolbenmaen Castle | Tomen; Plas Dolbenmaen | Timber Castle, Masonry Castle, Palace | earthwork |
| Dolwyddelan Castle | Dolvithalan; Doluithalan | Masonry Castle | major building | Edern manor of Bishop of Bangor | Palace | no visible |
| Gogarth Abbey, Great Orme | Gogarth Grange | Palace | masonry footings |
| Gwydir Castle | Gwydyr; Gweder | Tower House | masonry ruins/remnants | Nefyn | Tomen Nevin | Timber Castle | earthwork | Pen y Castell, Garreg Olau | Caer Oleu; Careg Oleu Rhiw Dafnau Maenan | Timber Castle, Masonry Castle | masonry footings | Pen-y-bryn, Aber | Twr Llewelyn; Llewelyn's Tower | Pele Tower, Palace | masonry ruins/remnants | Penrhyn Castle | Penryne; Gafael Goronwy ab Ednyfed | Tower House | masonry footings |
| Pier Camp, Bangor | Timber Castle | cropmark/slight earthwork | |
| Sinadon | Snowdon; Smardon; Sinnodune; Castell Caer Lleion; Castell Caer Seion | Timber Castle | earthwork |
| Tomen Castell, Old Dolwyddelan | Timber Castle, Masonry Castle | earthwork | |
| Tomen Fawr, Llanystumdwy | Dolwydln; Domen Fawr; Llanystwmdwy; Glan-llynau | Timber Castle | earthwork | Trefriw | Treurewe; Trevriw | Palace, Uncertain | no visible |
| Twthill, Caernarfon | Timber Castle | uncertain | Ty Newydd Mount, Llannor | Y Mount | Timber Castle | earthwork | Tyn Twr | Ty'n Twr; Twr Abercaseg; Llanllechid | Timber Castle, Pele Tower | cropmark/slight earthwork |
| Vortigern Castle, Pistyll | Nant Gwrtheirn | Timber Castle | uncertain |
