List of Scheduled Roman to modern Monuments in Gwynedd

Gwynedd is a large rural county in North Wales. The northern half includes the high mountains of Snowdonia and the mixed farmland and hills of the Lleyn peninsula, which between them make up the former county of Caernarvonshire. The southern part of Gwynedd is the softer coastal and upland landscapes of the former county of Merionethshire. Gwynedd, the second largest county in Wales, has a total of 497 Scheduled monuments. That is too many to have on a single list article, so for convenience the list is divided into three. The 365 prehistoric sites are in two lists, covering 171 sites in former Merionethshire, and 194 sites in former Caernarvonshire. Below are the 132 sites dating from Roman to modern times, from the whole of Gwynedd. Gwynedd is a unitary authority comprising most of two historic counties. In 1974 it also merged with Anglesey, and the merged county was also called Gwynedd. Since 1996 Anglesey has been a separate county again.

There are 16 Roman scheduled sites on the list, almost all of which relate either to Roman military activity, or local defensive measures. By contrast, the 14 early medieval (Dark Age) monuments are all individual stones, either with carved crosses or other inscriptions, or in one case a sundial. The 53 post-Norman medieval sites include sites included in the Castles and Town Walls of King Edward in Gwynedd World Heritage Site. 7 castles, 11 mottes, and 7 enclosures are scheduled, as well as deserted settlements, 2 abbeys, 5 chapels and 2 holy wells. The 49 post-medieval sites include 10 bridges, various sites relating to quarries, mines, engine houses, and railways, and 5 World War II defences.

The northern prehistoric sites are listed at List of Scheduled prehistoric Monuments in Gwynedd (former Caernarvonshire)

The southern prehistoric sites are listed at List of Scheduled prehistoric Monuments in Gwynedd (former Merionethshire)

Scheduled Ancient Monuments (SAMs) have statutory protection. It is illegal to disturb the ground surface or any standing remains. The compilation of the list is undertaken by Cadw Welsh Historic Monuments, which is an executive agency of the National Assembly of Wales.[1] The list of scheduled monuments below is supplied by Cadw[2] with additional material from RCAHMW and Gwynedd Archaeological Trust.

Scheduled Roman to modern Monuments in Gwynedd

Image	Name	Site type	Community	Location	Details	Historic County	Period	SAM No & Refs
	Enclosure & Settlement 400m East of Cyfannedd Fawr	Hut circle settlement	Arthog	52.6904°N 4.0223°W, SH634122		Merionethshire	Roman	ME086 [3]
	Round Hut and Cairns on NW Slope of Braich Ddu	Ring cairn	Arthog	52.6896°N 4.0208°W, SH635121		Merionethshire	Roman	ME100 [4]
	Pier Camp	Earthwork	Bangor	53.2339°N 4.1276°W, SH581729	Strongly defensible earthworth hillfort. A 4th century Roman coin found on the site.	Caernarvonshire	Unknown	CN073 [5]
	Dinas Emrys Camp	Hillfort	Beddgelert	53.0222°N 4.0788°W, SH606492	Hilltop fort which tradition links with Vortigern and Merlin. Iron Age, Roman and Dark Age evidence has all been found. Present stonework probably, medieval.	Caernarvonshire	Roman	CN018 [6]
	Brithdir Roman Fort	Roman fort	Brithdir and Llanfachreth	52.7535°N 3.8209°W, SH772188	Roman fortlet which may also have had its own settlement. Now on the edge of the village if Brithdir.	Merionethshire	Roman	ME080 [7]
	Segontium Roman Fort	Roman fort	Caernarfon	53.1372°N 4.2662°W, SH485624	Regiment garrisoned here from 77AD to 394AD, a uniquely long occupation within Wales. It was the administrative centre for NW Wales throughout this period. Excavated buildings on view.	Caernarvonshire	Roman	CN006 [8]
	Lower Roman Fort	Roman fort	Caernarfon	53.1367°N 4.2702°W, SH482623		Caernarvonshire	Roman	CN094 [9]
	Bryn-Glas Roman Signal Station	Signal station	Caernarfon	53.1473°N 4.2401°W, SH502634		Caernarvonshire	Roman	CN188 [10]
	Llanfor Roman Fort and Camps	Roman fort	Llandderfel	52.9124°N 3.582°W, SH937361	(revealed by Aerial Photography)	Merionethshire	Roman	ME092 [11]
	Caer Gai Roman Site	Roman fort	Llanuwchllyn	52.8688°N 3.6686°W, SH877314		Merionethshire	Roman	ME018 [12]
	Dinas y Prif Camp	Enclosure	Llanwnda	53.0949°N 4.2961°W, SH463577		Caernarvonshire	Roman	CN030 [13]
	Castell Tomen y Mur	Amphitheatre	Maentwrog	52.9299°N 3.925°W, SH705386		Merionethshire	Roman	ME002 [14]
	Tomen y Mur	Roman fort	Maentwrog	52.9276°N 3.9214°W, SH709384		Merionethshire	Roman	ME078 [15]
	Cefn-Caer Roman Site	Roman fort	Pennal	52.5832°N 3.9125°W, SH705000		Merionethshire	Roman	ME009 [16]
	Roman Bath-House, Tremadoc	Bath-house	Porthmadog	52.9392°N 4.1482°W, SH557401		Caernarvonshire	Roman	CN174 [17]
	Roman Kilns 225m SE of Pen-y-Stryd	Kiln	Trawsfynydd	52.8697°N 3.8918°W, SH727319		Merionethshire	Roman	ME071 [18]
	Dol-ddinas Roman Earthworks	Practice camp	Trawsfynydd	52.9241°N 3.8836°W, SH734379		Merionethshire	Roman	ME077 [19]
	Roman Practice Camp 440m WSW of Braich-ddu	Practice camp	Trawsfynydd	52.9274°N 3.9109°W, SH716383		Merionethshire	Roman	ME260 [20]
	Roman Practice Camps 190m W of Llyn Hiraethlyn	Practice camp	Trawsfynydd	52.9141°N 3.8733°W, SH741368		Merionethshire	Roman	ME261 [21]
	Roman Road Extending SE 650m from Llyn Hiraethlyn toward Glasgoed	Roman Road	Trawsfynydd	52.9135°N 3.8683°W, SH743368		Merionethshire	Roman	ME262 [22]
	The Senacus Stone (formerly in Tudweiliog, Dwyfer)	Inscribed stone	Aberdaron	52.8039°N 4.7113°W, SH173263		Caernarvonshire	Early Medieval	CN089 [23]
	The Veracius Stone (formerly in Tudweiliog, Dwyfer)	Inscribed stone	Aberdaron	52.8039°N 4.7113°W, SH173263		Caernarvonshire	Early Medieval	CN090 [24]
	Cross-Inscribed Stone in the Chapel, Bardsey Island	Cross-marked stone	Aberdaron	52.7641°N 4.7868°W, SH120221		Caernarvonshire	Early Medieval	CN141 [25]
	Inscribed Stone in the Chapel, Bardsey Island	Inscribed stone	Aberdaron	52.7641°N 4.7868°W, SH120221		Caernarvonshire	Early Medieval	CN142 [26]
	Sundial in Clynnog Fawr Churchyard	Sundial	Clynnog	53.0208°N 4.3656°W, SH414496		Caernarvonshire	Early Medieval	CN062 [27]
	Cross Inscribed Stone Near Capel Uchaf	Cross-marked stone	Clynnog	53.023°N 4.3417°W, SH430498		Caernarvonshire	Early Medieval	CN213 [28]
	Gesail Gyfarch Inscribed Stone	Inscribed stone	Dolbenmaen	52.9528°N 4.1746°W, SH540417		Caernarvonshire	Early Medieval	CN019 [29]
	Llystyn Gwyn Inscribed Stone	Inscribed stone	Dolbenmaen	52.9855°N 4.2626°W, SH482455		Caernarvonshire	Early Medieval	CN021 [30]
	Early Christian Inscribed Stone in the Churchyard, Llanaelhaearn	Inscribed stone	Llanaelhaearn	52.9764°N 4.4041°W, SH386448		Caernarvonshire	Early Medieval	CN084 [31]
	Part of Inscribed Stone Built into Wall of Churchyard	Inscribed stone	Llanaelhaearn	52.9763°N 4.4041°W, SH386448		Caernarvonshire	Early Medieval	CN085 [32]
	Inscribed Stone in St Cian's Churchyard, Llangian	Inscribed stone	Llanegan	52.8309°N 4.5314°W, SH295289		Caernarvonshire	Early Medieval	CN087 [33]
	Cross-Incised Stone in Llangybi Churchyard	Cross-marked stone	Llanystumdwy	52.9447°N 4.3402°W, SH428411		Caernarvonshire	Early Medieval	CN100 [34]
	Cross Slab Built into Farm Building Ty'n-y-Cae	Cross-marked stone	Nefyn	52.9404°N 4.5127°W, SH312410		Caernarvonshire	Early Medieval	CN180 [35]
	Tymawr Cross-Incised Stone	Cross-marked stone	Pistyll	52.9473°N 4.5023°W, SH319418		Caernarvonshire	Early Medieval	CN101 [36]
	Aber Castle Mound (Pen-y-Mwd)	Motte	Aber	53.2338°N 4.014°W, SH656726		Caernarvonshire	Medieval	CN007 [37]
	Medieval Homestead 400m SE of Maes y Gaer	Rectangular hut settlement	Aber	53.2307°N 3.9988°W, SH666722		Caernarvonshire	Medieval	CN137 [38]
	Enclosure & Associated Structures at Pen-y-Bryn	Enclosure	Aber	53.235°N 4.012°W, SH658727		Caernarvonshire	Medieval	CN218 [39]
	St Mary's Abbey, Bardsey Island	Abbey	Aberdaron	52.7643°N 4.7877°W, SH120221		Caernarvonshire	Medieval	CN068 [40]
	Site of St Merin's Church	Church	Aberdaron	52.8498°N 4.7143°W, SH173314		Caernarvonshire	Medieval	CN171 [41]
	Long Houses, Enclosures & Field Systems, Bardsey Island	Rectangular hut	Aberdaron	52.7674°N 4.7908°W, SH118225		Caernarvonshire	Medieval	CN186 [42]
	Capel Anelog	Chapel	Aberdaron	52.813°N 4.7377°W, SH155274		Caernarvonshire	Medieval	CN220 [43]
	Long House South of Talarfor	Longhouse	Aberdaron	52.8241°N 4.6251°W, SH232284		Caernarvonshire	Medieval	CN318 [44]
	St Mary's Church	Church	Aberdaron	52.7934°N 4.7612°W, SH139253		Caernarvonshire	Medieval	CN381 [45]
	Llys Bradwen Medieval Site	Enclosure	Arthog	52.7055°N 3.9993°W, SH650138		Merionethshire	Medieval	ME022 [46]
	Cyfannedd-Fach Homestead	Platform house	Arthog	52.6955°N 4.0257°W, SH631127		Merionethshire	Medieval	ME101 [47]
	Tomen y Bala Castle Mound	Motte	Bala	52.9115°N 3.5955°W, SH928360		Merionethshire	Medieval	ME016 [48]
	Ty'n Twr	Building (Unclassified)	Bethesda	53.1734°N 4.0571°W, SH626660		Caernarvonshire	Medieval	CN219 [49]
	Hafod-y-Wern Long Hut	Rectangular hut	Betws Garmon	53.0922°N 4.2016°W, SH526572		Caernarvonshire	Medieval	CN307 [50]
	Ystrad Rural Settlement	Deserted Rural Settlement	Betws Garmon	53.0935°N 4.1746°W, SH544573		Caernarvonshire	Medieval	CN316 [51]
	Cored Gwyrfai Fish Weir	Fish weir	Bontnewydd	53.1228°N 4.3151°W, SH453607		Caernarvonshire	Medieval	CN334 [52]
	Castell Cynfal, Bryn Crug	Motte	Bryn-crug	52.5946°N 4.0462°W, SH615016		Merionethshire	Medieval	ME121 [53]
	Caernarfon Town Walls	Town Wall	Caernarfon	53.141°N 4.2754°WCaernarfon Town Wall), SH479626		Caernarvonshire	Medieval	CN034 [54]
	Caernarfon Castle	Castle	Caernarfon	53.1394°N 4.277°W, SH477626		Caernarvonshire	Medieval	CN079 [55]
	St Beuno's Well	Holy Well	Clynnog	53.0188°N 4.367°W, SH413494		Caernarvonshire	Medieval	CN091 [56]
	Long Hut North of Cwm Farm	Rectangular hut	Clynnog	52.9887°N 4.3327°W, SH435460		Caernarvonshire	Medieval	CN309 [57]
	Criccieth Castle	Castle	Criccieth	52.916°N 4.2324°W, SH499377		Caernarvonshire	Medieval	CN015 [58]
	Criccieth Castle, Outer Bank Defences	Castle	Criccieth	52.9157°N 4.2338°W, SH499377		Caernarvonshire	Medieval	CN173 [59]
	Dolbenmaen Castle Mound	Motte	Dolbenmaen	52.9642°N 4.2251°W, SH506430		Caernarvonshire	Medieval	CN063 [60]
	Maes Coch Deserted Rural Settlement	Rectangular hut settlement	Dolgellau	52.721°N 3.8617°W, SH743153		Merionethshire	Medieval	ME196 [61]
	Settlement & Fields Systems above Egryn Abbey	House platform	Dyffryn Ardudwy	52.7617°N 4.0695°W, SH604202		Merionethshire	Medieval	ME122 [62]
	Eithin-Fynydd Platform House Settlement	Deserted Rural Settlement	Dyffryn Ardudwy	52.7749°N 4.0771°W, SH599217		Merionethshire	Medieval	ME202 [63]
	Deserted Rural Settlement South of Ffridd Olchfa	Deserted Rural Settlement	Dyffryn Ardudwy	52.7465°N 4.0598°W, SH610185		Merionethshire	Medieval	ME203 [64]
	Harlech Castle	Castle	Harlech	52.8602°N 4.1091°W, SH581312		Merionethshire	Medieval	ME044 [65]
	Medieval Ecclesiastical Structure SE of Ty'n y Coed Cottage	Chapel	Llanbedr	52.8265°N 4.0882°W, SH594274		Merionethshire	Medieval	ME249 [66]
	Dolbadarn Castle	Castle	Llanberis	53.1166°N 4.1143°W, SH586598		Caernarvonshire	Medieval	CN066 [67]
	Cwm Brwynog Deserted Rural Settlement	Deserted Rural Settlement	Llanberis	53.0901°N 4.1017°W, SH594574		Caernarvonshire	Medieval	CN315 [68]
	Rectangular Earthwork 110m NW of Coed Ty Mawr	Moated Site	Llanddeiniolen	53.1753°N 4.1629°W, SH555664		Caernarvonshire	Medieval	CN156 [69]
	Castell Llanddeiniolen	Motte	Llanddeiniolen	53.1677°N 4.1414°W, SH569655		Caernarvonshire	Medieval	CN197 [70]
	Llys Dinorwig	Enclosure	Llanddeiniolen	53.1463°N 4.1508°W, SH562631		Caernarvonshire	Medieval	CN223 [71]
	Pen-Ucha'r-Llan Ringwork	Ringwork	Llandderfel	52.9186°N 3.5805°W, SH938368		Merionethshire	Medieval	ME042 [72]
	Domen Ddreiniog	Motte	Llanegryn	52.6121°N 4.0737°W, SH596036		Merionethshire	Medieval	ME054 [73]
	Cymer Abbey	Abbey	Llanelltyd	52.7581°N 3.8962°W, SH721195		Merionethshire	Medieval	ME001 [74]
	Cymmer Castle	Motte	Llanelltyd	52.7585°N 3.8808°W, SH731195		Merionethshire	Medieval	ME150 [75]
	Castell y Bere	Castle	Llanfihangel-y-Pennant	52.6583°N 3.9711°W, SH667085		Merionethshire	Medieval	ME023 [76]
	Pont Maesgwm Deserted Rural Settlement	Deserted Rural Settlement	Llanfrothen	52.976°N 4.0324°W, SH635440		Merionethshire	Medieval	ME193 [77]
	Castell Gronw Castle Mound	Motte	Llangywer	52.902°N 3.5921°W, SH930350		Merionethshire	Medieval	ME067 [78]
	Huts 90m N of Cil Twllan	Platform house	Llanllechid	53.1779°N 4.0403°W, SH637664		Caernarvonshire	Medieval	CN144 [79]
	Cwm Caseg Deserted Rural Settlement	Deserted Rural Settlement	Llanllechid	53.1774°N 4.0254°W, SH647664		Caernarvonshire	Medieval	CN314 [80]
	Ty-Newydd Mound & Bailey Castle	Motte & Bailey	Llannor	52.9166°N 4.4604°W, SH346383		Caernarvonshire	Medieval	CN096 [81]
	Castell Carn Dochan	Castle	Llanuwchllyn	52.861°N 3.7139°W, SH847306		Merionethshire	Medieval	ME049 [82]
	Tomen Fawr	Ringwork	Llanystumdwy	52.9139°N 4.3002°W, SH454376		Caernarvonshire	Medieval	CN031 [83]
	Ffynnon Gybi	Holy Well	Llanystumdwy	52.9456°N 4.3421°W, SH427412		Caernarvonshire	Medieval	CN037 [84]
	Penarth Fawr Medieval House	House (domestic)	Llanystumdwy	52.9132°N 4.3524°W, SH419376		Caernarvonshire	Medieval	CN086 [85]
	Tomen Las Castle Mound	Motte	Pennal	52.5845°N 3.9245°W, SH697002		Merionethshire	Medieval	ME043 [86]
	Inscribed Stone in Llanfihangel Traethau Churchyard	Inscribed stone	Talsarnau	52.8975°N 4.0902°W, SH595353		Merionethshire	Medieval	ME050 [87]
	Llidiart-Garw Platform House and Paddock	Platform house	Talsarnau	52.8784°N 4.0641°W, SH611332		Merionethshire	Medieval	ME112 [88]
	Castell Prysor	Motte & Bailey	Trawsfynydd	52.9148°N 3.8487°W, SH757368		Merionethshire	Medieval	ME045 [89]
	Bont-Newydd	Bridge	Aber	53.2282°N 4.0049°W, SH662720		Caernarvonshire	Post-Medieval/Modern	CN061 [90]
	Cwm Erch Copper Mine	Copper mine	Beddgelert	53.057°N 4.04°W, SH633530		Caernarvonshire	Post-Medieval/Modern	CN193 [91]
	Glasdir Copper and Gold Mine Mill	Mill	Brithdir and Llanfachreth	52.7857°N 3.8715°W, SH738225		Merionethshire	Post-Medieval/Modern	ME206 [92]
	Pont y Cim	Bridge	Clynnog	53.0452°N 4.3263°W, SH441523		Caernarvonshire	Post-Medieval/Modern	CN053 [93]
	Water Balance Incline at Aberllefenni Slate Quarry	Incline	Corris	52.6746°N 3.824°W, SH767101		Merionethshire	Post-Medieval/Modern	ME185 [94]
	Gorseddau or Ynysypandy Slate Factory	Slate mill	Dolbenmaen	52.9681°N 4.1598°W, SH550433		Caernarvonshire	Post-Medieval/Modern	CN160 [95]
	Gilfach Copper Mine	Copper mine	Dolbenmaen	53.0069°N 4.1984°W, SH526477		Caernarvonshire	Post-Medieval/Modern	CN170 [96]
	Gorseddau Slate Quarry	Railway	Dolbenmaen	52.9858°N 4.1279°W, SH572452		Caernarvonshire	Post-Medieval/Modern	CN303 [97]
	Treforys Deserted Quarry Settlement	Settlement	Dolbenmaen	52.9865°N 4.1451°W, SH560453		Caernarvonshire	Post-Medieval/Modern	CN321 [98]
	Pont Scethin	Bridge	Dyffryn Ardudwy	52.7922°N 4.0265°W, SH634235		Merionethshire	Post-Medieval/Modern	ME126 [99]
	Pont Dol-y-Moch	Bridge	Ffestiniog	52.9561°N 3.9592°W, SH685416		Merionethshire	Post-Medieval/Modern	ME039 [100]
	Berth-Llwyd & Cefn Coch Gold Mining Complex	Mill	Ganllwyd	52.7932°N 3.9035°W, SH717233		Merionethshire	Post-Medieval/Modern	ME119 [101]
	Hermon or Dolfwynog Copper/Gold Bog Kiln	Kiln	Ganllwyd	52.812°N 3.8716°W, SH739254		Merionethshire	Post-Medieval/Modern	ME198 [102]
	Cwm Heisian West Lead and Gold Mine	Mill	Ganllwyd	52.8343°N 3.876°W, SH737279		Merionethshire	Post-Medieval/Modern	ME204 [103]
	Pont Llanbedr	Bridge	Llanbedr	52.8203°N 4.1006°W, SH585268		Merionethshire	Post-Medieval/Modern	ME026 [104]
	Dinorwic Quarry: Hafod Owen Winding Engine, Locomotive Shed, Main Waterwheel and Housing	Wheelhouse	Llanddeiniolen	53.1203°N 4.1154°W, SH585602		Caernarvonshire	Post-Medieval/Modern	CN163 [105]
	Dinorwic Quarry Barracks 'A' Incline	Barracks	Llanddeiniolen	53.12°N 4.1108°W, SH586601		Caernarvonshire	Post-Medieval/Modern	CN177 [106]
	Vivian Slate Quarry, Inclines, Walia & associated structures	Incline	Llanddeiniolen	53.1244°N 4.1141°W, SH586606		Caernarvonshire	Post-Medieval/Modern	CN198 [107]
	Dinorwic Quarry	Slate mill	Llanddeiniolen	53.1236°N 4.0966°W, SH597605		Caernarvonshire	Post-Medieval/Modern	CN337 [108]
	Pont Fawr	Bridge	Llandderfel	52.9171°N 3.5155°W, SH982366		Merionethshire	Post-Medieval/Modern	ME027 [109]
	Dinas Dinlle Seagull Trench	Seagull Trench	Llandwrog	53.0831°N 4.3354°W, SH436565		Caernarvonshire	Post-Medieval/Modern	CN396 [110]
	Slate Gwaliau at Felin Fawr, Penrhyn	Wall	Llandygai	53.1769°N 4.074°W, SH614664		Caernarvonshire	Post-Medieval/Modern	CN297 [111]
	Ogwen Fish Weir	Fish weir	Llandygai	53.2404°N 4.0943°W, SH600730		Caernarvonshire	Post-Medieval/Modern	CN335 [112]
	Cegin Viaduct (Penrhyn Railroad)	Viaduct	Llandygai	53.2299°N 4.1098°W, SH592723		Caernarvonshire	Post-Medieval/Modern	CN380 [113]
	Llanelltyd Bridge	Bridge	Llanelltyd	52.7562°N 3.901°W, SH718193		Merionethshire	Post-Medieval/Modern	ME006 [114]
	Water Powered Chain Incline at Bryneglwys Slate Quarry	Water Power System	Llanfihangel-y-Pennant	52.6289°N 3.9319°W, SH693052		Merionethshire	Post-Medieval/Modern	ME186 [115]
	Alltwyllt Slate Quarry Incline	Incline	Llanfihangel-y-Pennant	52.6407°N 3.9503°W, SH681065		Merionethshire	Post-Medieval/Modern	ME205 [116]
	Rhosydd Incline, Drumhouse & Tramway	Industrial monument	Llanfrothen	52.9977°N 4.0013°W, SH657463		Merionethshire	Post-Medieval/Modern	ME142 [117]
	Corn Drying Kiln Near Carn-Gadell Uchaf	Kiln	Llangelynin	52.655°N 4.0871°W, SH589084		Merionethshire	Post-Medieval/Modern	ME116 [118]
	The Holyhead Road: the Ogwen Pass	Road	Llanllechid	53.1276°N 4.0226°W, SH647608		Caernarvonshire	Post-Medieval/Modern	CN338 [119]
	Drws y Coed Copper Mine	Copper mine	Llanllyfni	53.0581°N 4.1707°W, SH546534		Caernarvonshire	Post-Medieval/Modern	CN162 [120]
	Dorothea Quarry Beam Engine	Engine house	Llanllyfni	53.0542°N 4.2435°W, SH497531		Caernarvonshire	Post-Medieval/Modern	CN165 [121]
	Dorothea Quarry, Pyramids, Inclines, Mill & Winding Houses, etc.	Engine house	Llanllyfni	53.0537°N 4.2393°W, SH500530		Caernarvonshire	Post-Medieval/Modern	CN199 [122]
	Pen-yr-Orsedd Quarry, Blondins and Associated Structures	Engine house	Llanllyfni	53.0635°N 4.2265°W, SH509541		Caernarvonshire	Post-Medieval/Modern	CN208 [123]
	Ty Mawr East Slate Quarry Winding Engine House	Engine house	Llanllyfni	53.0492°N 4.2407°W, SH499525		Caernarvonshire	Post-Medieval/Modern	CN300 [124]
	Blaen y Cae Slate Quarry	Unclassified site	Llanllyfni	53.0591°N 4.243°W, SH497536		Caernarvonshire	Post-Medieval/Modern	CN301 [125]
	Cloddfa'r Lon Slate Quarry	Slate mill	Llanllyfni	53.0564°N 4.2356°W, SH503534		Caernarvonshire	Post-Medieval/Modern	CN302 [126]
	Pont Tai-Hirion Old Bridge	Bridge	Llanycil	52.9424°N 3.7821°W, SH803398		Merionethshire	Post-Medieval/Modern	ME028 [127]
	Capel Gallt-Coed	Chapel	Llanystumdwy	52.9382°N 4.277°W, SH470402		Caernarvonshire	Post-Medieval/Modern	CN117 [128]
	Afon Cynfal Deserted Rural Settlement	Rectangular hut settlement	Maentwrog	52.9547°N 3.8597°W, SH751413		Merionethshire	Post-Medieval/Modern	ME190 [129]
	Afon Goch Deserted Rural Settlement	Longhouse	Maentwrog	52.9501°N 3.8582°W, SH753407		Merionethshire	Post-Medieval/Modern	ME191 [130]
	Pont Minllyn	Bridge	Mawddwy	52.7106°N 3.6891°W, SH859138		Merionethshire	Post-Medieval/Modern	ME094 [131]
	Machynlleth Bridge	Bridge	Pennal, (also Machynlleth), (see also Powys)	52.6005°N 3.8557°W, SH744019	Also known as Pont ar Dyfi	Merionethshire	Post-Medieval/Modern	MG002 [132]
	Cei Tyddyn Isa	Quarry	Penrhyndeudraeth	52.9348°N 4.0412°W, SH629395		Merionethshire	Post-Medieval/Modern	ME108 [133]
	Pen-y-Gwryd Pillboxes	Pillbox	Beddgelert	53.0799°N 4.0036°W, SH659555		Caernarvonshire	Post-Medieval/Modern	CN397 [134]
	Fairbourne Anti-invasion Defences	Anti-invasion defence site	Arthog	52.6983°N 4.0571°W, SH610131	The tank traps stretch for some 3 kilometres (1.9 mi) along the beach	Merionethshire	Post Medieval/Modern	ME252 [135]
	Anti-invasion Defences 630m E of Cae'r-tyddyn	Anti-tank Obstacle	Brithdir and Llanfachreth	52.7396°N 3.7854°W, SH795172		Merionethshire	Post-Medieval/Modern	ME250 [136]
	Nant Ffrancon Anti-invasion Defences	Anti-invasion defence site	Llandygai, (also Capel Curig), (see also Conwy)	53.1252°N 4.0222°W, SH647605		Caernarvonshire	Post-Medieval/Modern	CN399 [137]
	Anti-invasion Defences 2000m NE of Cwmrhwyddfor Farm	Anti-tank Obstacle	Llanfihangel-y-Pennant	52.7036°N 3.8492°W, SH751133		Merionethshire	Post-Medieval/Modern	ME251 [138]

Scheduled Monuments in Gwynedd, Wales.
=Roman =Early Medieval
=Medieval =Post-Medieval/Modern

See also

• List of Cadw properties
• List of castles in Wales
• List of hill forts in Wales
• Historic houses in Wales
• List of monastic houses in Wales
• List of museums in Wales
• List of Roman villas in Wales

References

• Coflein is the online database of RCAHMW: Royal Commission on the Ancient and Historical Monuments of Wales, GAT is the Gwynedd Archaeological Trust, Cadw is the Welsh Historic Monuments Agency

1. Cadw: Ancient Monuments and Scheduling. Accessed 25 April 2013
2. Cadw will send their list as a spreadsheet, or other electronic formats, on request, as indicated at www.whatdotheyknow.com. This list uses information dated May 2012
3. coflein NPRN: 302834. GAT PRN: 4898. Cadw SAM: ME086: Enclosure & Settlement 400m East of Cyfannedd Fawr
4. coflein NPRN: 302835. GAT PRN: 4903. Cadw SAM: ME100: Round Hut and Cairns on NW Slope of Braich Ddu
5. coflein NPRN: 302712. GAT PRN: 2299. Cadw SAM: CN073: Pier Camp
6. coflein NPRN: 95284. GAT PRN: 1462. Cadw SAM: CN018: Dinas Emrys Camp
7. coflein NPRN: 95480. GAT PRN: 1546. Cadw SAM: ME080: Brithdir Roman Fort
8. coflein NPRN: 93511. GAT PRN: 3089. Cadw SAM: CN006: Segontium Roman Site
9. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN094: Lower Roman Fort
10. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN188: Bryn-Glas Roman Signal Station
11. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME092: Llanfor Roman Fort and Camps (revealed by Aerial Photography)
12. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME018: Caer Gai Roman Site
13. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN030: Dinas y Prif Camp
14. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME002: Castell Tomen y Mur
15. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME078: Tomen y Mur
16. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME009: Cefn-Caer Roman Site
17. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN174: Roman Bath-House, Tremadoc
18. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME071: Roman Kilns 225m SE of Pen-y-Stryd
19. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME077: Dol-ddinas Roman Earthworks
20. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME260: Roman Practice Camp 440m WSW of Braich-ddu
21. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME261: Roman Practice Camps 190m W of Llyn Hiraethlyn
22. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME262: Roman Road Extending SE 650m from Llyn Hiraethlyn toward Glasgoed
23. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN089: The Senacus Stone (formerly in Tudweiliog, Dwyfer)
24. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN090: The Veracius Stone (formerly in Tudweiliog, Dwyfer)
25. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN141: Cross-Inscribed Stone in the Chapel, Bardsey Island
26. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN142: Inscribed Stone in the Chapel, Bardsey Island
27. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN062: Sundial in Clynnog Fawr Churchyard
28. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN213: Cross Inscribed Stone Near Capel Uchaf
29. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN019: Gesail Gyfarch Inscribed Stone
30. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN021: Llystyn Gwyn Inscribed Stone
31. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN084: Early Christian Inscribed Stone in the Churchyard, Llanaelhaearn
32. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN085: Part of Inscribed Stone Built into Wall of Churchyard
33. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN087: Inscribed Stone in St Cian's Churchyard, Llangian
34. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN100: Cross-Incised Stone in Llangybi Churchyard
35. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN180: Cross Slab Built into Farm Building Ty'n-y-Cae
36. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN101: Tymawr Cross-Incised Stone
37. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN007: Aber Castle Mound (Pen-y-Mwd)
38. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN137: Medieval Homestead 400m SE of Maes y Gaer
39. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN218: Enclosure & Associated Structures at Pen-y-Bryn
40. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN068: St Mary's Abbey, Bardsey Island
41. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN171: Site of St Merin's Church
42. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN186: Long Houses, Enclosures & Field Systems, Bardsey Island
43. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN220: Capel Anelog
44. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN318: Long House South of Talarfor
45. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN381: St Mary's Church
46. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME022: Llys Bradwen Medieval Site
47. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME101: Cyfannedd-Fach Homestead
48. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME016: Tomen y Bala Castle Mound
49. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN219: Ty'n Twr
50. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN307: Hafod-y-Wern Long Hut
51. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN316: Ystrad Rural Settlement
52. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN334: Cored Gwyrfai Fish Weir
53. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME121: Castell Cynfal, Bryn Crug
54. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN034: Caernarfon Town Wall
55. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN079: Caernarfon Castle
56. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN091: St Beuno's Well
57. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN309: Long Hut North of Cwm Farm
58. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN015: Criccieth Castle
59. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN173: Criccieth Castle, Outer Bank Defences
60. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN063: Dolbenmaen Castle Mound
61. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME196: Maes Coch Deserted Rural Settlement
62. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME122: Settlement & Fields Systems above Egryn Abbey
63. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME202: Eithin-Fynydd Platform House Settlement
64. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME203: Deserted Rural Settlement South of Ffridd Olchfa
65. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME044: Harlech Castle
66. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME249: Medieval Ecclesiastical Structure SE of Ty'n y Coed Cottage
67. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN066: Dolbadarn Castle
68. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN315: Cwm Brwynog Deserted Rural Settlement
69. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN156: Rectangular Earthwork 110m NW of Coed Ty Mawr
70. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN197: Castell Llanddeiniolen
71. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN223: Llys Dinorwig
72. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME042: Pen-Ucha'r-Llan Ringwork
73. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME054: Domen Ddreiniog
74. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME001: Cymer Abbey
75. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME150: Cymmer Castle
76. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME023: Castell y Bere
77. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME193: Pont Maesgwm Deserted Rural Settlement
78. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME067: Castell Gronw Castle Mound
79. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN144: Huts 90m N of Cil Twllan
80. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN314: Cwm Caseg Deserted Rural Settlement
81. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN096: Ty-Newydd Mound & Bailey Castle
82. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME049: Castell Carn Dochan
83. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN031: Tomen Fawr
84. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN037: Ffynnon Gybi
85. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN086: Penarth Fawr Medieval Hall
86. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME043: Tomen Las Castle Mound
87. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME050: Inscribed Stone in Llanfihangel Traethau Churchyard
88. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME112: Llidiart-Garw Platform House and Paddock
89. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME045: Castell Prysor
90. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN061: Bont-Newydd
91. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN193: Cwm Erch Copper Mine
92. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME206: Glasdir Copper and Gold Mine Mill
93. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN053: Pont y Cim
94. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME185: Water Balance Incline at Aberllefenni Slate Quarry
95. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN160: Gorseddau or Ynysypandy Slate Factory
96. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN170: Gilfach Copper Mine
97. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN303: Gorseddau Slate Quarry
98. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN321: Treforys Deserted Quarry Settlement
99. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME126: Pont Scethin
100. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME039: Pont Dol-y-Moch
101. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME119: Berth-Llwyd & Cefn Coch Gold Mining Complex
102. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME198: Hermon or Dolfwynog Copper/Gold Bog Kiln
103. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME204: Cwm Heisian West Lead and Gold Mine
104. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME026: Pont Llanbedr
105. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN163: Dinorwic Quarry: Hafod Owen Winding Engine, Locomotive Shed, Main Waterwheel and Housing
106. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN177: Dinorwic Quarry Barracks 'A' Incline
107. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN198: Vivian Slate Quarry, Inclines, Walia & associated structures
108. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN337: Dinorwic Quarry
109. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME027: Pont Fawr
110. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN396: Dinas Dinlle Seagull Trench
111. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN297: Slate Gwaliau at Felin Fawr, Penrhyn
112. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN335: Ogwen Fish Weir
113. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN380: Cegin Viaduct (Penrhyn Railroad)
114. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME006: Llanelltyd Bridge
115. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME186: Water Powered Chain Incline at Bryneglwys Slate Quarry
116. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME205: Alltwyllt Slate Quarry Incline
117. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME142: Rhosydd Incline, Drumhouse & Tramway
118. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME116: Corn Drying Kiln Near Carn-Gadell Uchaf
119. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN338: The Holyhead Road: the Ogwen Pass
120. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN162: Drws y Coed Copper Mine
121. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN165: Dorothea Quarry Beam Engine
122. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN199: Dorothea Quarry, Pyramids, Inclines, Mill & Winding Houses, etc
123. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN208: Pen-yr-Orsedd Quarry, Blondins and Associated Structures
124. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN300: Ty Mawr East Slate Quarry Winding Engine House
125. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN301: Blaen y Cae Slate Quarry
126. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN302: Cloddfa'r Lon Slate Quarry
127. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME028: Pont Tai-Hirion Old Bridge
128. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN117: Capel Gallt-Coed
129. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME190: Afon Cynfal Deserted Rural Settlement
130. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME191: Afon Goch Deserted Rural Settlement
131. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME094: Pont Minllyn
132. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: MG002: Machynlleth Bridge
133. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME108: Cei Tyddyn Isa
134. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN397: Pen-y-Gwryd Pillboxes
135. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME252: Fairbourne Anti-invasion Defences
136. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME250: Anti-invasion Defences 630m E of Cae'r-tyddyn
137. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: CN399: Nant Ffrancon Anti-invasion Defences
138. coflein NPRN: not yet identified. GAT PRN not yet identified. Cadw SAM: ME251: Anti-invasion Defences 2000m NE of Cwmrhwyddfor Farm