Certain |
Possible |
Questionable Doubtful |
Rejected |
|
Confidence is a statement of the site as a medieval fortification or palace |
| Name | Alternative Name(s) | County | Remains | Aberffraw llys and motte | Anglesey | Earthworks | Cae Llys, Rhosyr | Anglesey | Earthworks | Llanallgo manor of Bishop of Bangor | Anglesey | Nothing visible | Treffos manor of Bishop of Bangor | Anglesey | Nothing visible |
| Llanddew Palace | Brecknockshire | Masonry foundations | |
| Bangor Bishops Palace | Caernarfonshire | Masonry ruins/remnants | |
| Caernarfon Castle | Caernarvon; Carnarvon | Caernarfonshire | Major | Caernarfon manor of Bishop of Bangor | Caernarfonshire | Nothing visible |
| Dinas Emrys Castle | Caernarfonshire | Masonry foundations | Edern manor of Bishop of Bangor | Caernarfonshire | Nothing visible |
| Gogarth Abbey, Great Orme | Gogarth Grange | Caernarfonshire | Masonry footings | Llanddywy manor of Bishop of St Davids | Llanddewi | Cardiganshire | Nothing visible | Abergwili manor of Bishop of St Davids | Carmarthenshire | Nothing visible |
| Kidwelly Castle | Cydweli | Carmarthenshire | Major |
| Llystroyddyn | Carmarthenshire | Uncertain | Llandegla manor of Bishop of St Asaph | Denbighshire | Nothing visible | Meliden manor of Bishop of St Asaph | Flintshire | Nothing visible | Bishopston, Gower manor of Bishop of Llandaff | Glamorgan | Masonry ruins/remnants |
| Llandaff Bishops Palace | Glamorgan | Major | Llanddewi Castle, Port Eynon | Glamorgan | Nothing visible |
| Llantwit Major Bishops Palace | Llantwyt | Glamorgan | Earthworks |
| Swansea Castle | New Castle; Abertawe; Seinhenydd; Gower; Goher; Sueineshea; Suenesel | Glamorgan | Masonry ruins/remnants | Bishopston, Monmouthshire manor of Bishop of Llandaff | Bishton | Monmouthshire | Nothing visible | Mathern Bishops Palace | Monmouthshire | Masonry ruins/remnants | Lamphey Bishops Palace | Lamphey Court | Pembrokeshire | Masonry ruins/remnants |
| Llawhaden Castle | Llanyhadein; Lauwadein; Lanwadein; Llanwhadein; Lawhaden | Pembrokeshire | Major |
| St Davids Bishops Palace | Pembrokeshire | Major | Trevine Bishops Palace | Trefine | Pembrokeshire | Uncertain |
| Cwrt Llechrhyd, Llanelwedd | Cwrt Llechryd | Radnorshire | Earthworks |