Cadw is the historic environment service of the Welsh Government which manages historical buildings and ancient monuments in Wales.
{| class=" wikitable sortable" style="clear: both"
|-
! colspan="3" scope="col" |Property
! rowspan="3" scope="col" | Image
! rowspan="3" scope="col" |Type
! rowspan="3" scope="col" |Access
! rowspan="3" scope="col" |Principal area
! rowspan="3" scope="col" |Community
! rowspan="3" scope="col" |Historic county
! rowspan="3" scope="col" | Grid reference
! rowspan="3" scope="col" | Coordinates
! rowspan="3" scope="col" class="unsortable" |Ref.
|-
! rowspan="2" |Common English name
! colspan="2" |Standardised name
|-
!Welsh
!English
|-
! scope="row" | Barclodiad y Gawres
|
|Barclodiad y Gawres Chambered Tomb
|left|100px|Barclodiad y Gawres, Interior|| Burial Chamber||Free||Isle of Anglesey||Aberffraw||Anglesey|| SH329707 || ||<!--PlaceID=25-->
|-
! scope="row" | Basingwerk Abbey
|
|Basingwerk Abbey
|left|100px|Basingwerk Abbey|| Religious||Free||Flintshire||Holywell||Flintshire|| SJ196774 || ||<!--PlaceID=26-->
|-
! scope="row" | Beaumaris Castle
|
|Beaumaris Castle
|left|100px|Beaumaris Castle|| Castle <br />20px World Heritage Site.||Pay||Isle of Anglesey||Beaumaris ||Anglesey|| SH607762<br />postcode LL58 8AP || ||<!--PlaceID=27-->
|-
! scope="row" | Blaenavon Ironworks
|
|Blaenafon Ironworks
|100px|| Industrial <br />20px World Heritage Site.||Free||Torfaen||Blaenavon ||Monmouthshire|| SO249092<br />postcode NP4 9RN || ||<!--PlaceID=145-->
|-
! scope="row" | Bodowyr
|
|Bodowyr Chambered Tomb
|100px|| Burial Chamber ||Free||Isle of Anglesey||Llanidan||Anglesey|| SH462681 || ||<!--PlaceID=29-->
|-
! scope="row" | Y Gaer
|
|Y Gaer Roman Fort
|100px|| Roman Fort||Free||Powys||Yscir||Brecknockshire|| SO003296 || ||<!--PlaceID=144-->
|-
! scope="row" | Bronllys Castle
| colspan="2" |
|100px|| Castle||Free||Powys||Bronllys||Brecknockshire|| SO149347 || ||<!--PlaceID=30-->
|-
! scope="row" | Bryn Celli Ddu
|
|Bryn Celli Ddu Chambered Tomb
|100px|| Burial Chamber ||Free||Isle of Anglesey||Llanddaniel Fab||Anglesey|| SH507701 || ||<!--PlaceID=31-->
|-
! scope="row" | Bryntail lead mine
|
|Bryn-tail Leadworks
|100px|| Industrial||Free||Powys||Llanidloes Without||Montgomeryshire|| SN913868 || ||<!--PlaceID=32-->
|-
! scope="row" | Caer Gybi
|
|Caer Gybi Roman Fort
|100px|| Roman Fort||Free||Isle of Anglesey||Holyhead||Anglesey|| SH247826 || ||<!--PlaceID=33-->
|-
! scope="row" | Caer Lêb
|
|Caer Lêb Romano-British Farm
|100px|| Enclosure||Free||Isle of Anglesey||Llanidan||Anglesey|| SH472674 || ||<!--PlaceID=34-->
|-
! scope="row" | Caer y Twr
|
|Caer y Twr Roman Watchtower
|100px|| Hill Fort||Free||Isle of Anglesey||Trearddur||Anglesey|| SH219829 || ||<!--PlaceID=35-->
|-
!Caergwrle Castle
| colspan="2" |
|100x100px
|Castle
|Free
|Flintshire
|Caergwrle
|Flintshire
|SJ3057557213
|
|
|-
! scope="row" | Caerleon Roman Fortress and Baths
|
|Caerleon Roman Amphitheatre
Caerleon Roman Baths
Caerleon Roman Barracks
|100px|| Roman Fort and Baths
Barracks
|Free
|Newport
|Caerleon
|Monmouthshire
|ST337906
|
|<!--PlaceID=36-->
|-
! scope="row" | Caernarfon Castle
| colspan="2" |
|100px|| Castle <br />20px World Heritage Site.<!--PlaceID=19-->
|-
! scope="row" | Caernarfon town walls
|
|Caernarfon Town Walls
|100px|| Town Walls <br />20px World Heritage Site.<!--PlaceID=38-->
|-
! scope="row" | Caerphilly Castle
|
|Caerphilly Castle
|100px|| Castle||Pay||Caerphilly||Caerphilly||Glamorganshire|| ST155870 || ||<!--PlaceID=39-->
|-
! scope="row" | Caerwent
|
|Caer-went Roman Town
|100px|| Roman Town||Free||Monmouthshire||Caerwent||Monmouthshire|| ST469907 || ||<!--PlaceID=40-->
|-
! scope="row" | Capel Garmon
|
|Capel Garmon Chambered Tomb
|100px|| Burial Chamber||Free||Conwy||Bro Garmon||Denbighshire|| SH817543 || ||<!--PlaceID=41-->
|-
! scope="row" | Capel Lligwy
| colspan="2" |
|100px|| Religious||Free||Isle of Anglesey||Moelfre||Anglesey|| SH499863 || ||<!--PlaceID=42-->
|-
! scope="row" | Carew Cross
|
|Carew Cross
|100px|| Religious||Free||Pembrokeshire||Carew||Pembrokeshire|| SN047037 || ||<!--PlaceID=43-->
|-
! scope="row" | Carreg Cennen Castle
| colspan="2" |
|100px|| Castle||Pay||Carmarthenshire||Dyffryn Cennen||Carmarthenshire|| SN668190 || ||<!--PlaceID=17-->
|-
! scope="row" | Carreg Coetan Arthur
|
|Carreg Coetan Arthur Chambered Tomb
|100px|| Burial Chamber||Free||Pembrokeshire||Newport||Pembrokeshire|| SN060394 || ||<!--PlaceID=45-->
|-
! scope="row" | Carswell Medieval House
|
|Carswell Medieval House
|100px|| Domestic||Free (Ext.)||Pembrokeshire||Penally||Pembrokeshire|| SN098010 || ||<!--PlaceID=46-->
|-
! scope="row" | Castell Bryn Gwyn
|
|Castell Bryngwyn Prehistoric Enclosure
|100px|| Prehistoric||Free||Isle of Anglesey||Llanidan||Anglesey|| SH465670 || ||<!--PlaceID=47-->
|-
! scope="row" | Castell Coch
| colspan="2" |
|100px|| Castle||Pay||Cardiff||Tongwynlais||Glamorganshire|| ST130826 || ||<!--PlaceID=48-->
|-
! scope="row" | Castell y Bere
| colspan="2" |
|100px|| Castle||Free||Gwynedd||Llanfihangel-y-Pennant||Merionethshire|| SH667085 || ||<!--PlaceID=49-->
|-
! scope="row" | Bulwarks Camp, Chepstow
|
|Bulwarks Prehistoric Enclosure
|100px|| Prehistoric enclosure ||Free||Monmouthshire||Chepstow||Monmouthshire|| ST538927 || ||<!--lang=en&PlaceId=52-->
|-
! scope="row" | Chepstow Castle
|
|Chepstow Castle
|100px|| Castle||Pay||Monmouthshire||Chepstow||Monmouthshire|| ST533940 || ||<!--PlaceID=50-->
|-
! scope="row" | Chepstow Port Wall
|
|Chepstow Port Wall
|100px|| Town Walls||Free||Monmouthshire||Chepstow||Monmouthshire|| ST533937 || ||<!--lang=en&PlaceId=51-->
|-
! scope="row" | Cilgerran Castle
| colspan="2" |
|100px|| Castle||Pay||Pembrokeshire||Cilgerran||Pembrokeshire|| SN194431 || ||<!--PlaceID=53-->
|-
! scope="row" | Coity Castle
| colspan="2" |
|100px|| Castle||Free||Bridgend||Coity Higher||Glamorganshire|| SS923814 || ||<!--PlaceID=54-->
|-
! scope="row" | Conwy Castle
| colspan="2" |
|100px|| Castle <br />20px World Heritage Site.<!--PlaceID=55-->
|-
! scope="row" | Conwy town walls
|
|Conwy Town Walls
|100px|| Town Walls 20px <br />World Heritage Site.<!--PlaceID=56-->
|-
! scope="row" | Criccieth Castle
| colspan="2" |
|100px|| Castle||Pay||Gwynedd||Criccieth||Caernarfonshire|| SH499377 || ||<!--PlaceID=57-->
|-
! scope="row" | Cymer Abbey
|
|Cymer Abbey
|100px|| Religious||Free||Gwynedd||Llanelltyd||Merionethshire|| SH721195 || ||<!--PlaceID=58-->
|-
! scope="row" | Denbigh Castle
|
|Denbigh Castle
|100px|| Castle||Pay||Denbighshire||Denbigh||Denbighshire|| SJ051657 || ||<!--PlaceID=59-->
|-
! scope="row" | Denbigh Friary
|
|Denbigh Friary Church
|80px|| Religious||Free||Denbighshire||Denbigh||Denbighshire|| SJ059665 || ||<!--PlaceID=60-->
|-
! scope="row" | Denbigh Town Walls
|
|Denbigh Town Walls
|100px|| Town Walls||Free||Denbighshire||Denbigh||Denbighshire|| SJ052657 || ||<!--PlaceID=61-->
|-
! scope="row" | Leicester's Church
|
|Earl of Leicester's Church
|100px|| Religious||Free||Denbighshire||Denbigh||Denbighshire|| SJ053659 || ||<!--PlaceID=85-->
|-
! scope="row" | St Hilary's Chapel
|
|St Hilary's Chapel
|100px|| Religious||Free||Denbighshire||Denbigh||Denbighshire|| SJ052659 || ||<!--PlaceID=122-->
|-
! scope="row" | Derwen Churchyard Cross
|
|Derwen Cross
|100px|| Religious||Free||Denbighshire||Derwen||Denbighshire|| SJ070507 || ||<!--PlaceID=62-->
|-
! scope="row" | Din Dryfol
|
|Din Dryfol Chambered Tomb
|100px|| Burial Chamber||Free||Isle of Anglesey||Aberffraw||Anglesey|| SH395724 || ||<!--PlaceID=63-->
|-
! scope="row" | Din Lligwy
|
|Din Llugwy Romano-British Village
|100px|| Hut Group||Free||Isle of Anglesey||Moelfre||Anglesey|| SH497861 || ||<!--PlaceID=64-->
|-
! scope="row" | Dinefwr Castle
| colspan="2" |
|100px|| Castle||Free||Carmarthenshire||Llandeilo||Carmarthenshire|| SN622224 || ||<!--PlaceID=65-->
|-
! scope="row" | Dolbadarn Castle
| colspan="2" |
|100px|| Castle||Free||Gwynedd||Llanberis||Caernarfonshire|| SH586598 || ||<!--PlaceID=66-->
|-
! scope="row" | Dolforwyn Castle
| colspan="2" |
|100px|| Castle||Free||Powys||Llandyssil||Montgomeryshire|| SO151950 || ||<!--PlaceID=67-->
|-
! scope="row" | Dolwyddelan Castle
| colspan="2" |
|100px|| Castle||Pay||Conwy||Dolwyddelan||Caernarfonshire|| SH721523 || ||<!--PlaceID=68-->
|-
! scope="row" | Dryslwyn Castle
| colspan="2" |
|100px|| Castle||Free||Carmarthenshire||Llangathen||Carmarthenshire|| SN554203 || ||<!--PlaceID=69-->
|-
! scope="row" | Dyffryn Ardudwy
|
|Dyffryn Ardudwy Chambered Tomb
|100px|| Burial Chamber||Free||Gwynedd||Dyffryn Ardudwy||Merionethshire|| SH588228 || ||<!--PlaceID=70-->
|-
! scope="row" | Dyfi Furnace
|
|Dyfi Furnace
|100px|| Industrial||Free||Ceredigion||Ysgubor-y-coed||Cardiganshire|| SN684950 || ||<!--PlaceID=71-->
|-
! scope="row" | Eliseg's Pillar
|
|Eliseg's Pillar
|100px|| Religious||Free||Denbighshire||Llantysilio||Denbighshire|| SJ202445 || ||<!--PlaceID=72-->
|-
! scope="row" | Ewenny Priory
|
|Ewenni Priory
|100px|| Religious||Free||The Vale of Glamorgan||Ewenny||Glamorganshire|| SS912778 || ||<!--PlaceID=73-->
|-
! scope="row" | Ewloe Castle
| colspan="2" |
|100px|| Castle||Free||Flintshire||Hawarden||Flintshire|| SJ288675 || ||<!--PlaceID=74-->
|-
! scope="row" | Flint Castle
| colspan="2" |
|100px|| Castle||Free||Flintshire||Flint||Flintshire|| SJ246732 || ||<!--PlaceID=75-->
|-
! scope="row" | Grosmont Castle
|
|Grosmont Castle
|100px|| Castle||Free||Monmouthshire||Grosmont||Monmouthshire|| SO405244 || ||<!--PlaceID=76-->
|-
! scope="row" | Gwydir Uchaf Chapel
| colspan="2" |
|100px|| Religious||Free||Conwy||Trefriw||Caernarfonshire|| SH794609 || ||<!--PlaceID=77-->
|-
! scope="row" | Hafoty Medieval House
|
|Hafoty Medieval House
|100px|| Domestic||Free (Ext.)||Isle of Anglesey||Cwm Cadnant||Anglesey|| SH562781 || ||
|-
! scope="row" | Harlech Castle
| colspan="2" |
|100px|| Castle 20px <br />World Heritage Site.<!--PlaceID=78-->
|-
! scope="row" | Haverfordwest Priory
|
|Haverfordwest Priory
|100px|| Religious||Free||Pembrokeshire||Haverfordwest||Pembrokeshire|| SM956151 || ||<!--PlaceID=79-->
|-
! scope="row" | Hen Gwrt Moated Site
|
|Hen Gwrt Medieval Moated Site
|100px|| Domestic||Free||Monmouthshire||Llantilio Crossenny||Monmouthshire|| SO395151 || ||<!--PlaceID=80-->
|-
! scope="row" | Holyhead Mountain Hut Circles
|
|Holyhead Mountain Prehistoric Village
|100px|| Hut Group||Free||Isle of Anglesey||Trearddur||Anglesey|| SH212820 || ||<!--PlaceID=81-->
|-
! scope="row" | Kidwelly Castle
|
|Kidwelly Castle
|100px|| Castle||Pay||Carmarthenshire||Kidwelly||Carmarthenshire|| SN409070 || ||<!--PlaceID=82-->
|-
! scope="row" | Lamphey Bishop's Palace
|
|Bishop's Palace, Lamphey
|100px|| Religious||Free||Pembrokeshire||Lamphey||Pembrokeshire|| SN018009 || ||<!--PlaceID=83-->
|-
! scope="row" | Laugharne Castle
|
|Laugharne Castle
|100px|| Castle||Pay||Carmarthenshire||Laugharne Township||Carmarthenshire|| SN302107 || ||<!--PlaceID=84-->
|-
! scope="row" | Llangar Church
|
|Llangar Old Church
|100px|| Religious||Pay||Denbighshire||Cynwyd||Merionethshire|| SJ063424 || ||<!--PlaceID=86-->
|-
! scope="row" | Llanmelin Wood Hill Fort
|
|Llanmelin Wood Hillfort
|100px|| Hill Fort||Free||Monmouthshire||Caerwent||Monmouthshire|| ST461925 || ||<!--PlaceID=87-->
|-
! scope="row" | Llansteffan Castle
| colspan="2" |
|100px|| Castle||Free||Carmarthenshire||Llansteffan||Carmarthenshire|| SN351101 || ||<!--PlaceID=88-->
|-
! scope="row" | Llanthony Priory
|
|Llanthony Priory
|100px|| Religious||Free||Monmouthshire||Crucorney||Monmouthshire|| SO289278 || ||<!--PlaceID=89-->
|-
! scope="row" | Llawhaden Castle
|
|Llawhaden Castle
|80px|| Castle||Free||Pembrokeshire||Llawhaden||Pembrokeshire|| SN073175 || ||<!--PlaceID=90-->
|-
! scope="row" | Lligwy Burial Chamber
|
|Llugwy Chambered Tomb
|100px|| Burial Chamber||Free||Isle of Anglesey||Moelfre||Anglesey|| SH501860 || ||<!--PlaceID=91-->
|-
! scope="row" | Loughor Castle
|
|Loughor Castle
|100px|| Castle||Free||Swansea||Llwchwr||Glamorganshire|| SS564979 || ||<!--PlaceID=92-->
|-
! scope="row" | Maen Achwyfan Cross
|
|Maen Achwyfan Cross
|100px|| Religious||Free||Flintshire||Whitford||Flintshire|| SJ128787 || ||<!--PlaceID=93-->
|-
! scope="row" | Margam Stones Museum
|
|Margam Stones Museum
|100px|| Religious||Pay||Neath Port Talbot||Margam||Glamorganshire|| SS801864 || ||<!--PlaceID=94-->
|-
! scope="row" | Monmouth Castle
|
|Monmouth Castle
|100px|| Castle||Free||Monmouthshire||Monmouth||Monmouthshire|| SO506128 || ||<!--PlaceID=95-->
|-
! scope="row" | Montgomery Castle
|
|Montgomery Castle
|100px|| Castle||Free||Powys||Montgomery||Montgomeryshire|| SO221967 || ||<!--PlaceID=96-->
|-
! scope="row" | Neath Abbey
|
|Neath Abbey
|100px|| Religious||Free||Neath Port Talbot||Dyffryn Clydach||Glamorganshire|| SS738974 || ||<!--PlaceID=97-->
|-
! scope="row" | Newcastle Castle
|
|Newcastle Castle
|100px|| Castle||Free||Bridgend||Bridgend||Glamorganshire|| SS902800 || ||<!--PlaceID=98-->
|-
! scope="row" | Newport Castle
|
|Newport Castle
|100px|| Castle||Free||Newport||Stow Hill||Monmouthshire|| ST311884 || ||<!--PlaceID=99-->
|-
! scope="row" | Ogmore Castle
|
|Ogmore Castle
|100px|| Castle||Free||The Vale of Glamorgan||St Bride's Major||Glamorganshire|| SS881769 || ||<!--PlaceID=100-->
|-
! scope="row" | Old Beaupre Castle
|
|Old Beaupre Castle
|100px|| Castle||Free||The Vale of Glamorgan||Llanfair||Glamorganshire|| ST008720 || ||<!--PlaceID=101-->
|-
! scope="row" | Oxwich Castle
| colspan="2" |
|100px|| Castle||Pay||Swansea||Penrice||Glamorganshire|| SS497862 || ||<!--PlaceID=102-->
|-
! scope="row" | Parc Cwm long cairn at
Parc le Breos
|
|Parc le Breos Chambered Tomb
|100px|| Burial Chamber||Free||Swansea||Ilston||Glamorganshire|| SS537898 || ||<!--PlaceID=103-->
|-
! scope="row" | Penarth Fawr
| colspan="2" |
|100px|| Medieval House||?||Gwynedd||Llanystumdwy||Caernarfonshire|| SH419376 || ||<!--PlaceID=104-->
|-
! scope="row" | Penmon Cross
|
|Penmon Cross
|50px|| Religious||Free||Isle of Anglesey||Llangoed||Anglesey|| SH630807 || ||<!--PlaceID=105-->
|-
! scope="row" | Penmon Dovecote
|
|Penmon Dovecote
|100px|| Domestic||Free||Isle of Anglesey||Llangoed||Anglesey|| SH631807 || ||<!--PlaceID=106-->
|-
! scope="row" | Penmon Priory
|
|Penmon Priory
|100px|| Religious||Free||Isle of Anglesey||Llangoed||Anglesey|| SH630807 || ||<!--PlaceID=107-->
|-
! scope="row" | St Seiriol's Well
|
|St Seiriol's Well
|100px|| Religious||Free||Isle of Anglesey||Llangoed||Anglesey|| SH630808 || ||<!--PlaceID=126-->
|-
! scope="row" | Penrhos Feilw Standing Stones
|
|Penrhosfeilw Standing Stones
|100px|| Prehistoric||Free||Isle of Anglesey||Trearddur||Anglesey|| SH227809 || ||<!--PlaceID=108-->
|-
! scope="row" | Pentre Ifan
|
|Pentre Ifan Chambered Tomb
|100px|| Burial Chamber||Free||Pembrokeshire||Nevern||Pembrokeshire|| SN099370 || ||<!--PlaceID=109-->
|-
! scope="row" | Plas Mawr, Conwy
| colspan="2" |
|100px|| Domestic||Pay||Conwy||Conwy||Caernarfonshire|| SH780775 || ||<!--PlaceID=110-->
|-
! scope="row" | Pont Minllyn
| colspan="2" |
|100px|| Bridge||Free||Gwynedd||Mawddwy||Merionethshire|| SH859138 || ||<!--PlaceID=111-->
|-
! scope="row" | Presaddfed Burial Chamber
|
|Presaddfed Chambered Tomb
|100px|| Burial Chamber||Free||Isle of Anglesey||Bodedern||Anglesey|| SH347808 || ||<!--PlaceID=112-->
|-
! scope="row" | Raglan Castle
| colspan="2" |
|100px|| Castle||Pay||Monmouthshire||Raglan||Monmouthshire|| SO417085 || ||<!--PlaceID=113-->
|-
! scope="row" | Rhuddlan Castle
| colspan="2" |
|100px|| Castle||Pay||Denbighshire||Rhuddlan||Flintshire|| SJ024779 || ||<!--PlaceID=114-->
|-
! scope="row" | Rug Chapel
| colspan="2" |
|100px|| Religious||Pay||Denbighshire||Corwen||Merionethshire|| SJ064438 || ||<!--PlaceID=115-->
|-
! scope="row" | Runston Chapel
|
|Runston Church
|100px|| Religious|| ||Monmouthshire||Mathern||Monmouthshire|| ST496915 || ||<!--PlaceID=116-->
|-
! scope="row" | Segontium Roman Fort
|
|Segontium Roman Fort
|100px|| Roman Fort||Free||Gwynedd||Caernarfon||Caernarfonshire|| SH485624 || ||<!--PlaceID=117-->
|-
! scope="row" | Skenfrith Castle
|
|Skenfrith Castle
|100px|| Castle||Free||Monmouthshire||Llangattock-Vibon-Avel||Monmouthshire|| SO456203 || ||<!--PlaceID=118-->
|-
! scope="row" | St Cybi's Well
|
|St Cybi's Well
|100px|| Religious||Free||Gwynedd||Llangybi||Gwynedd|| SH427413 || ||<!--PlaceID=119-->
|-
! scope="row" | St Davids Bishop's Palace
|
|St Davids Bishop’s Palace
|100px|| Religious||Pay||Pembrokeshire||St Davids||Pembrokeshire|| SM750254 || ||<!--PlaceID=120-->
|-
! scope="row" | St Dogmaels Abbey
|
|St Dogmaels Abbey
|100px|| Religious||Free||Pembrokeshire||St Dogmaels||Pembrokeshire|| SN164458 || ||<!--PlaceID=121-->
|-
! scope="row" | St Lythans burial chamber
|
|St Lythans Chambered Tomb
|100px|| Burial Chamber||Free||The Vale of Glamorgan||Wenvoe||Glamorganshire|| ST100723 || ||<!--PlaceID=123-->
|-
! scope="row" | Chapel of St Non
|
|St Non's Chapel
|100px|| Religious||Free||Pembrokeshire||St Davids||Pembrokeshire|| SM750243 || ||<!--PlaceID=124-->
|-
! scope="row" | St Quentin's Castle, Llanblethian
|
|Llanblethian Castle
|100px|| Castle||Free||The Vale of Glamorgan||Cowbridge with Llanblethian||Glamorganshire|| SS989741 || ||<!--PlaceID=125-->
|-
! scope="row" | St Winefride's Chapel and Well
|
|St Winefride's Chapel and Well
|100px|| Religious||Free||Flintshire||Holywell||Flintshire|| SJ185762 || ||<!--PlaceID=127-->
|-
! scope="row" | Strata Florida Abbey
|
|Strata Florida Abbey
|100px|| Religious||Pay||Ceredigion||Ystrad Fflur||Cardiganshire|| SN746657 || ||<!--PlaceID=128-->
|-
! scope="row" | Swansea Castle
|
|Swansea Castle
|100px|| Castle||Free (External only)||Swansea||Swansea||Glamorganshire|| SS657930 || ||<!--PlaceID=129-->
|-
! scope="row" | Talley Abbey
|
|Talley Abbey
|100px|| Religious||Free||Carmarthenshire||Talley||Carmarthenshire|| SN632327 || ||<!--PlaceID=130-->
|-
! scope="row" | Tinkinswood
|
|Tinkinswood Chambered Tomb
|100px|| Burial Chamber||Free||The Vale of Glamorgan||St Nicholas and Bonvilston||Glamorganshire|| ST092732 || ||<!--PlaceID=131-->
|-
! scope="row" | Tintern Abbey
|
|Tintern Abbey
|100px|| Religious||Pay||Monmouthshire||Tintern||Monmouthshire|| SO533000 || ||<!--PlaceID=132-->
|-
! scope="row" | Trefignath
|
|Trefignath Chambered Tomb
|100px|| Burial Chamber||Free||Isle of Anglesey||Trearddur||Anglesey|| SH258805 || ||<!--PlaceID=133-->
|-
! scope="row" | Tregwehelydd Standing Stone
|
|Tregwehelydd Standing Stone
|100px|| Prehistoric||Free||Isle of Anglesey||Tref Alaw||Anglesey|| SH340831 || ||<!--PlaceID=134-->
|-
! scope="row" | Tretower Castle
| rowspan="2" |
| rowspan="2" |Tretower Castle and Court
|100px|| Castle||Pay||Powys||Llanfihangel Cwmdu||Brecknockshire|| SO184212 || ||<!--PlaceID=135-->
|-
! scope="row" | Tretower Court
|100px|| Castle||Pay||Powys||Llanfihangel Cwmdu||Brecknockshire|| SO185211 || ||<!--PlaceID=136-->
|-
! scope="row" | Twthill
|
|Twtil, Castle Motte
|100px|| Castle Mound||Free||Denbighshire||Rhuddlan||Flintshire|| SJ026776 || ||<!--PlaceID=137-->
|-
! scope="row" | Tŷ Mawr Standing Stone
|
|Tŷ Mawr Standing Stone
|100px|| Prehistoric||Free||Isle of Anglesey||Holyhead||Anglesey|| SH253809 || ||<!--PlaceID=138-->
|-
! scope="row" | Tŷ Newydd Burial Chamber
|
|Tŷ Newydd Chambered Tomb
|100px|| Burial Chamber ||Free||Isle of Anglesey||Llanfaelog||Anglesey|| SH344738 || ||<!--PlaceID=139-->
|-
! scope="row" | Valle Crucis Abbey
|
|Valle Crucis Abbey
|100px|| Religious||Pay||Denbighshire||Llantysilio||Denbighshire|| SJ204441 || ||<!--PlaceID=140-->
|-
! scope="row" | Weobley Castle
|
|Weobley Castle
|100px|| Castle||Pay||Swansea||Llanrhidian Lower||Glamorganshire|| SS478927 || ||<!--PlaceID=141-->
|-
! scope="row" | White Castle
|
|White Castle
|100px|| Castle||Free||Monmouthshire||Llantilio Crossenny||Monmouthshire|| SO379167 || ||<!--PlaceID=142-->
|-
! scope="row" | Wiston Castle
|
|Wiston Castle
|100px|| Castle||Free||Pembrokeshire||Wiston||Pembrokeshire|| SN022181 || ||<!--PlaceID=143-->
|}
Location map
See also
- List of National Trust properties in Wales
- Lists of scheduled monuments in Wales