Menai Strait in the context of "Roman conquest of Anglesey"

Anglesey (/ˈæŋɡəlsi/ ANG-gəl-see; Welsh: Ynys Môn [ˈənɨs ˈmoːn]) is an island off the north-west coast of Wales. It forms the bulk of the county known as the Isle of Anglesey, which also includes Holy Island (Ynys Gybi) and some islets and skerries. The county borders Gwynedd across the Menai Strait to the southeast, and is otherwise surrounded by the Irish Sea. Holyhead is the largest town, and the administrative centre is Llangefni.

The Isle of Anglesey has an area of 275 square miles (712 km) and had a population of 69,097 in 2024. After Holyhead, located on Holy Island, the largest settlements are Llangefni in the centre of Anglesey and Amlwch on the northern coast. The economy of the county is mostly based on agriculture, energy, and tourism, the latter especially on the coast. Holyhead is also a major ferry port for Dublin, Ireland. The county has the second-highest percentage of Welsh speakers in Wales, at 57.2%, and is considered a heartland of the language. The Isle of Anglesey is part of the preserved county of Gwynedd.

Gwynedd (Welsh: [ˈɡwɨnɛð]) is a county in the north-west of Wales. It borders Anglesey across the Menai Strait to the north, Conwy, Denbighshire, and Powys to the east, Ceredigion over the Dyfi estuary to the south, and the Irish Sea to the west. The city of Bangor is the largest settlement, and the administrative centre is Caernarfon. The preserved county of Gwynedd, which is used for ceremonial purposes, includes the Isle of Anglesey.

Gwynedd is the second largest county in Wales but sparsely populated, with an area of 979 square miles (2,540 km) and a population of 117,400. After Bangor (18,322), the largest settlements are Caernarfon (9,852), Bethesda (4,735), and Pwllheli (4,076). The county has the highest percentage of Welsh speakers in Wales, at 64.4%, and is considered a heartland of the language.

The Snowdon Massif, Snowdon Range, or Yr Wyddfa massif, is one of the three mountain groups in Snowdonia (Eryri), north Wales, to include mountains over 3,000 feet (914 m) high. It occupies the area between Beddgelert, Pen-y-Pass and Llanberis. It is surrounded by the Glyderau to the north-east, Moel Siabod to the east, the Moelwynion to the south, Moel Hebog, the Nantlle Ridge and Mynydd Mawr to the west, and by flatter land leading down to Caernarfon and the Menai Strait to the north-west.

The Snowdon Horseshoe is the name given to the semi-circular ring of ridges and peaks on Snowdon's (Yr Wyddfa) eastern side, i.e. facing down Dyffryn Mymbyr towards Capel Curig. The peaks in the Horseshoe are those of Y Lliwedd, Snowdon, Garnedd Ugain and Crib Goch.

Caernarfon (/kərˈnɑːrvən, kɑːr-/; Welsh: [kaɨrˈnarvɔn] ) is a royal town, community and port in Gwynedd, Wales. It has a population of 9,852 (with Caeathro). It lies along the A4871 road, on the eastern shore of the Menai Strait, opposite the island of Anglesey. The city of Bangor is 8.6 miles (13.8 km) to the north-east, while Snowdonia (Eryri) fringes Caernarfon to the east and south-east.

Abundant natural resources in and around the Menai Strait enabled human habitation in prehistoric Britain. The Ordovices, a Celtic tribe, lived in the region during the period known as Roman Britain. The Roman fort Segontium was established around AD 80 to subjugate the Ordovices during the Roman conquest of Britain. The Romans occupied the region until the end of Roman rule in Britain in 382, after which Caernarfon became part of the Kingdom of Gwynedd. In the late 11th century, William the Conqueror ordered the construction of a motte-and-bailey castle at Caernarfon as part of the Norman invasion of Wales. He was unsuccessful, and Wales remained independent until around 1283.