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Welsh Castle Database
Table 3: O through Z
Welsh Unitary Authority Boundaries (effective April 1996)
Old County map of Wales (1974-96)
Table 1: A through G
Table 2: H through N
Table 3: O through Z
| NAME / AKA | COUNTY / OS POINT | BUILT / NOTED | CASTLE TYPE / REMAINS |
| Old Radnor | Powys / SO250590 | moated site close to church | |
| Ogmore | V of Glamorgan / SS882769 | 1116 | substantial masonry |
| Old Castle | Glamorgan | 12th century | ringwork castle |
| Old Castle (Llygod) | V of Glamorgan | medieval castle or hillford? | |
| Old Hall Frydd | Montgomery | 1228 | ringwork |
| Overton | Wrexham / SJ368434 | 1138 | castle swept away by River Dee |
| Oswestry | Shropshire | 1149 | motte castle w/slight masonry |
| Oxwich | Swansea / SS498862 | 1459 | essentially complete |
| Oystermouth | Swansea / SS613883 | 1116 | essentially complete |
| Painscastle | Powys / SO167461 | 1130 | substantial motte & ditches |
| Pant Glas | Carmarthen / SN422260 | ringwork/platform | |
| Pant y Cadno | Pembroke / SN112226 | likely site of motte, disputed | |
| Pant-y-Fen | Carmarthen / SN462401 | ringwork or hillfort | |
| Parc y Castell | Ceredigion / SN288427 | ringwork and bailey | |
| Parc y Marl | Pembroke / SN047245 | damaged earthwork/ringwork? | |
| Pembridge | Herefordshire | 1203 | enclosure castle |
| Pembroke | Pembroke / SM982016 | 1094 | essentially complete |
| Pen y Castell | Ceredigion / SN630746 | 13th century | trace masonry |
| Penycastell | Ceredigion / SN663675 | small motte survives | |
| Pen y Clawdd | Monmouth / SO310201 | motte w/double moat | |
| Pen y Mwd | Gwynedd | 12th century? | motte visible |
| Pen yr Allt | Pembroke / SN158420 | ditched and banked enclosure | |
| Penarth Motte | Powys / SO124526 | mound on spur above river Edw | |
| Pencader | Carmarthen / SN445362 | 1145 | motte & ditch survive |
| Pencastell | Carmarthen / SN402379 | motte & ditch survive | |
| Pencelli | Powys / SO095249 | 1215 | remains of square keep |
| Pencoed | Newport / ST406894 | 1270 | essentially complete |
| Castell Pengawsai | Pembroke / SN110280 | small ringwork | |
| Penhow | Newport / ST432908 | 1200 | essentially complete |
| Penlan | Powys / SO154723 | rocky outcrop/disputed site | |
| Penlle'r Castell | Swansea / SN664094 | 13th century | trace masonry |
| Penllyn | V of Glamorgan / SS988761 | 12th century | masonry tower |
| Penmaen | Swansea | 1116 | timber ringwork |
| Penmark | V of Glamorgan | 13th century | slight masonry |
| Pennant | Powys / SN875975 | motte with rock cut ditch | |
| Pennard | Swansea / SS544885 | early 12th century | some masonry |
| Penrhos | Monmouth / SO410132 | built/destroyed 1248? | motte visible |
| Penrice, Mounty Bank | Swansea / SS492879 | ringwork | |
| Penrice (no.2) | Swansea / SS497885 | 1250 | substantial masonry |
| Pentre Isaf | Conwy / SH874689 | motte survives | |
| Pentre Llaeth Enwyn | Powys / SJ215157 | disputed site | |
| Pentrefoelas | Conwy / SH87005225 | 12thC? | large motte, bailey small and doubtful |
| Pen-y-Allt | Pembroke / SN158420 | ringwork with curtain and tower | |
| Peterson | V of Glamorgan / ST084764 | 1404 | single masonry wall |
| Picton 1 (Dungledi) | Pembroke / SN016135 | large damaged motte | |
| Picton 2 | Pembroke / SN011135 | 13th century | essentially complete |
| Pilleth | Powys / SO258676 | 1342 | motte and bailey |
| Castell Pistog | Ceredigion / SN382403 | mound by farm, ploughed bailey | |
| Plas-yn-Dinas | Powys / SJ218189 | enclosure castle | |
| Castell Poeth | Pembroke / SM897377 | damaged motte or ringwork | |
| Pointz (Punch Castle) | Pembroke / SM830237 | motte, fragments of uncertain date | |
| Porthkerry | V.of Glamorgan / ST083658 | remains washed out to sea | |
| Powis | Powys / SJ216064 | 1110 | essentially complete |
| Prestatyn | Denbigh / SJ073833 | 1162 | slight masonry |
| Presteigne, Warden | Powys / SO309645 | 1144 | ringwork & bailey |
| Castell Pridd | Carmarthen / SN295296 | 1203 | fine motte and bailey |
| Prysor | Gwynedd / SH758369 | 1284 | trace masonry |
| Pulford | Cheshire / SJ375587 | small motte & bailey | |
| Pulverbatch | Shropshire / SJ423023 | motte and ditches survive | |
| Puncheston | Pembroke / SN009298 | partial ringwork with foundations | |
| Pytindu Motte | Powys / SO047310 | vanished castle mound | |
| Pytingwyn Motte | Powys / SO040314 | vanished castle mound | |
| New Radnor | Powys / SO212610 | 1129 | motte and foundations |
| Raglan | Monmouth / SO415083 | 1430 | essentially complete |
| Rhaeadr-gwy | 1177 | motte | |
| Rhayader | Powys / SN968680 | 1202 | remains of ringwork |
| Rhos Ddiarbed | Powys / SO046905 | 1080s | motte and bailey |
| Rhuddlan no.1 (Twthill) | Denbigh / SJ026777 | 1075 | motte visible |
| Rhuddlan (no.2) | Denbigh / SJ025779 | 1277 | substantial masonry |
| Rhyd y Felin | Ceredigion | 1100 | ringwork w/bailey |
| Rhyd-yr-Onen | Powys / SN923823 | motte w/2 baileys | |
| Rhydygors | Carmarthen / SN408190 | 1094 | predecessor to Carmarthen? |
| Rhysnant Motte | Powys / SJ256175 | very mutilated ringwork | |
| Richard's Castle | Herefordshire | 1051 | masonry, motte and bailey |
| Risca, Twyn Bar-Lwm | Monmouth | motte and bailey | |
| Roch | Pembroke / SM880212 | 13th century | substantial tower |
| Roche | Carmarthen / SN294102 | fragments of 13c fortified house | |
| Roft | Wrexham / SJ357562 | 1161 | site damaged by railway/quarrying |
| Rogerstone | Newport / ST271878 | grass-covered motte | |
| Rudbaxton Rath | Pembroke / SM985188 | ringwork & bailey | |
| Rudbaxton Motte | Pembroke / SM961205 | motte survives | |
| Rug | Gwynedd | 1160 | motte and bailey |
| Rumney | Cardiff / ST210789 | 1184 | ringwork - gatehouse destroyed |
| Ruperra Motte (Castell Breiniog) | Caerphilly / ST223867 | fine motte & bailey | |
| Ruthin | Denbigh | 1277 | some early masonry |
| St. Athan, Castleton | V of Glamorgan / ST024684 | masonry walls | |
| St.Briavels 1 | Gloustershire / SS559288 | 1130 | ringwork w/stone fragments |
| St.Briavels 2 | Gloustershire / SO559046 | 1139 | substantial masonry castle |
| St. Clears, Banc y Beili | Carmarthen / SN281154 | 1153 | substantial motte & bailey |
| St. Davids (Parc y Castell) | Pembroke / SM744252 | 1081 | ringwork w/2 baileys |
| St. Donats | V of Glamorgan / SS934681 | 13th century | some early masonry |
| St. Fagans | Cardiff / ST120771 | 1307 | slight early masonry |
| St. Georges | V.of Glamorgan / ST099770 | ||
| St. Ishmaels | Pembroke / SM835076 | ||
| St. Mary's Hill | V.of Glamorgan / SS960786 | ||
| St. Mary's | Ceredigion / SN344442 | ||
| St. Mellons | Cardiff / ST227803 | 12th century | enclosure castle |
| St. Nicholas | V of Glamorgan / ST084747 | ringwork castle | |
| Scethrog Tower | Powys / SO105249 | 12th-13th century | standing tower house |
| Scurlage | Swansea / SS463882 | Tudor farm on reputed site | |
| Sennybridge, Castell Du | Powys / SN919283 | 13th century | slight masonry |
| Sentence (Narberth 1) | Pembroke / SN111116 | 1116 | ringwork with wet ditches |
| Shrewsbury | Shropshire | 1069 | rebuilt early medeival castle |
| Shotwick | Cheshire | 1240 | destroyed/once walled w/6 towers |
| Simon's | Powys / SO285933 | 1220s | masonry enclosure castle |
| Skenfrith | Monmouth / SO457202 | 1168 | substantial masonry |
| Snodhill | Herefordshire | 1135 | masonry, motte and bailey |
| Stackpole | Pembroke / SR997961 | former tower house | |
| Stanage | Powys / SO331731 | damaged motte w/bailey platform | |
| Stokesay | Shropshire | late 13th century | enclosure/essentially complete |
| Stormy | Bridgend / SS846815 | 12th century | motte |
| Sully | V of Glamorgan / ST152683 | 12th century | built-over |
| Swansea 1 | Swansea | 1116 | motte castle built-over |
| Swansea 2 | Swansea / SS657931 | late 13th century | tower, hall & solar survive |
| Sycharth | Powys / SJ205257 | 12th century? | motte visible |
| Tafolwern | Montgomery | 1162 | motte and bailey |
| Talyfan | V of Glamorgan / ST021772 | 1245 | ringwork w/trace masonry |
| Talgarth (no.1) | Powys / SO155337 | 1156 | vanished site |
| Talgarth (no.2) | Powys / SO158297 | very worn down ringwork | |
| Talgarth (no.3) | Powys / SO140324 | two visible mottes | |
| Talgarth (no.4) | Powys / SO 142323 | bailey, motte damaged by railway | |
| Talgarth (no.5) | Powys / SO145314 | ringwork w/possible masonry | |
| Talgarth Tower | Powys / SO154337 | much altered 13-14c tower | |
| Tal-y-Bont | Glamorgan | 1106 | mound visible |
| Talley | Carmarthen / SN631334 | motte and bailey on isthmus | |
| Tan-y-Castell | Ceredigion | ||
| Tenby | Pembroke / SN138005 | 1153 | some masonry |
| Tinboeth | Powys / SO090755 | 1242-82 | substantial motte and ditch |
| Tomen (Old Dolwyddelan) | Conwy | 12th century | motte visible |
| Tomen (Radnor) | Powys / SO173589 | mound visible | |
| Tomen Cefn Coch Motte | Montgomery / SJ105263 | motte w/rock-cut ditch | |
| Tomen y Clawdd | Rhondda C.T. / ST091865 | 12th century | motte visible |
| Tomen y Faerdre | Denbigh / SJ194562 | 1086? | large motte visible |
| Tomenlawddog | Carmarthen / SN360362 | damaged motte w/silted ditch | |
| Tomen Llanio | Ceredigion / SN661579 | 1136 | substantial motte |
| Tomen y Mur | Gwynedd / SH705386 | 1090 | motte and bailey on Roman fort |
| Tomen y Rhodwydd | Denbigh / SJ176516 | 1149 | motte / bailey visible |
| Tomen Rhyd-Owen | Ceredigion / SN444447 | motte & ditch survive | |
| Tomen-yr-Allt | Powys | captured 1257 | motte and bailey |
| Tomenseba | Carmarthen / SN325370 | motte & ditch survive | |
| Trecastle | Monmouth / SO452070 | motte and bailey w/wet moat | |
| Trecastle | Powys / SN882292 | motte and bailey | |
| Tredustan Motte | Powys / SO140324 | motte | |
| Trefadog | Anglesey / SH291859 | 14th century | enclosure castle w/foundations |
| Trefecca | Powys / SO142323 | motte and bailey | |
| Trefecca Fawr | Powys / SO145314 | 1145 | ringwork |
| Trefilan | Ceredigion / SN548572 | 1233 | motte |
| Treflyn (aka Llyn Gwyn | Powys / SO012650 | small motte visible | |
| Tregarnedd | Anglesey / SH468746 | moated court | |
| Trellech | Monmouth / SO500054 | 1231 | mound visible |
| Tretower | Powys / SO184212 | 1100 | substantial tower |
| Treveddw | Monmouth / SO330217 | mound visible | |
| Trewern | Powys / SS268114 | 1256 | mound |
| Castell Troggy | Newport / ST415952 | 1305 | large keep, round tower, 2 wards |
| Trostrey | Monmouth / SO360043 | 12th century | enclosure castle |
| Trueman's Hill | Flint / SJ313660 | earthworks visible | |
| Tump Terrett | Monmouth | 1231 | motte visible |
| Twmbarlwm | Torfan / ST243926 | 12th century | motte and bailey |
| Twmpath | Cardiff / ST154822 | motte visible | |
| Twrla Mound | Carmarthen / SN645370 | disputed site | |
| Twyn y Garth | Powys / SO108437 | weak ringwork w/bailey | |
| Twyn y Gregen | Monmouth / SO363096 | 12th century | prob Welsh motte |
| Ty Du | V.of Glamorgan / ST046770 | small motte? | |
| Ty'n Twr | Gwynedd / SH626660 | ||
| Tyddyn | Flintshire / SJ253634 | mound | |
| Tymaur Motte (Twmpan) | Powys / SO125257 | 1197? | motte of sandstone covered with earth |
| Tymawr | Gwynedd / SH569655 | possible motte much quarried away | |
| Tythegston | Bridgend / SS857789 | tower house | |
| Ucheldre | Denbigh / SJ049452 | disputed site | |
| Upton | Pembroke / SN020047 | 13th century | rebuilt medieval castle |
| Usk | Monmouth / SO376011 | 1136-54 | substantial masonry castle |
| Vaynor | Merthyr Tydfil / SO047102 | small motte visible | |
| Wallston | V of Glamorgan / ST119 713 | 1262 | no remains of ruined tower |
| Walterston | V. of Glamorgan | trace masonry | |
| Walterstone | Hereford / SO339250 | abandoned 1137 | mound and traces of bailey |
| Walwyn's | Pembroke | earthwork castle | |
| Waun Tympath | Carmarthen / SN466026 | overgrown motte | |
| Welshpool (Lady's Mount) | Powys | 1090 | motte and bailey, pos masonry |
| Welshpool (Domen) | Powys | motte and bailey | |
| Weobley | Swansea / SS478927 | 1397 | essentially complete |
| Weobley | Hereford & Worcester | 1138 | motte and ditches |
| Whitchurch | Cardiff / ST156804 | 1275 | motte castle |
| White | Monmouth / SO380168 | 1138 | substantial masonry |
| Whittington | Shropshire | 1138 | some masonry |
| Wigmore | Hereford / Worcester | 1070 | substantial masonry |
| Wilton | Herefordshire | 1155 | enclosure castle |
| Wiston | Pembroke / SN022181 | 1147 | motte and bailey with shell keep |
| Wolfscastle | Pembroke / SM958265 | 1229 | motte and bailey |
| Wolves Newton | Monmouth / ST449999 | platform | |
| Womaston | Powys / SO268606 | motte and bailey | |
| Wrexham | Wrexham / SJ327487 | 1161 | motte visible |
| Wrinstone | V.of Glamorgan / ST135726 | tower mentioned now gone | |
| Wuan Gunllwch | Powys | half ringwork | |
| Y Doman Las | Gwynedd / SH697004 | ||
| Y Foelas | Denbigh / SH 870522 | 1198 | large motte obscured by woods |
| Y Pigwrn | Carmarthen / SN820310 | small motte in corner of Roman camp | |
| Ynyscrug | Rhondda C.T. / SS995928 | small segment of mound remains | |
| Ysgubor-y-Coed | Ceredigion | 1136 | motte |
| Ystrad Peithyll | Ceredigion / SN653824 | 1116 | motte castle |
| Ystradfellte | Powys / SN936145 | 1230 | trace masonry |
| Ystradmeurig | Ceredigion | 1116 | foundation traces |
| Ystradowen | V of Glamorgan / ST011777 | motte visible | |
| Ystum Enlli | Carmarthen / SN584032 | mound and square enclosure |
Table 1: A through G