Anglesey in the context of "North West Wales"

The Irish Sea is a 46,007 km (17,763 sq mi) body of water that separates the islands of Ireland and Great Britain. It is linked to the Celtic Sea in the south by St George's Channel and to the Inner Seas off the West Coast of Scotland in the north by the North Channel. Anglesey, North Wales, is the largest island in the Irish Sea, followed by the Isle of Man. The term Manx Sea may occasionally be encountered (Welsh: Môr Manaw, Irish: Muir Meann Manx: Mooir Vannin, Scottish Gaelic: Muir Mhanainn).

On its shoreline are Scotland to the north, England to the east, Wales to the southeast, Northern Ireland and the Republic of Ireland to the west. The Irish Sea is of significant economic importance to regional trade, shipping and transport, as well as fishing and power generation in the form of wind power and nuclear power plants. Annual traffic between Great Britain and Ireland is over 12 million passengers and 17 million tonnes (17,000,000 long tons; 19,000,000 short tons) of traded goods.

This article is a list of some of the islands that form the British and Irish Isles that have an area of 1 square kilometre (247 acres) or larger, listing area and population data. The total area of the islands is 314,965 km (121,609 sq mi). Great Britain accounts for the larger part of this area at 66%, with Ireland accounting for 26%, leaving the remaining 8%—an area of 23,996 km (9,265 sq mi)—consisting of thousands of smaller islands. The largest of the other islands are to be found in the Hebrides and the Northern Isles to the north, and Anglesey and the Isle of Man between Great Britain and Ireland. Not included are the Channel Islands which, positioned off the coast of France, are not part of the archipelago.

There are 188 permanently inhabited islands in total:

The Roman conquest of Britain was the Roman Empire's conquest of most of the island of Britain, which was inhabited by the Celtic Britons. It began in earnest in AD 43 under Emperor Claudius, and was largely completed in the southern half of Britain (most of what is now called England and Wales) by AD 87, when the Stanegate was established. The conquered territory became the Roman province of Britannia.

Following Julius Caesar's invasions of Britain in 54 BC, some southern British chiefdoms had become allies of the Romans. The exile of their ally Verica gave the Romans a pretext for invasion. The Roman army was recruited in Italia, Hispania, and Gaul and used the newly-formed fleet Classis Britannica. Under their general Aulus Plautius, the Romans pushed inland from the southeast, defeating the Britons in the Battle of the Medway. By AD 47, the Romans held the lands southeast of the Fosse Way. British resistance was led by the chieftain Caratacus until his defeat in AD 50. The isle of Mona, a stronghold of the druids, was attacked in AD 60. This was interrupted by an uprising led by Boudica, in which the Britons destroyed Camulodunum, Verulamium and Londinium. The Romans put down the rebellion by AD 61.

The Ordovices (from Latin: Ordovīcēs; Common Brittonic: *Ordowīces) were one of the Celtic tribes living in Great Britain before the Roman invasion. Their tribal lands were located in present-day North Wales and England, between the Silures to the south and the Deceangli to the north-east. Unlike the latter tribes that appear to have acquiesced to Roman rule with little resistance, the Ordovices fiercely resisted the Romans. They were eventually subjugated by the Roman governor Gnaeus Julius Agricola in the campaign of 77–78CE when the Romans overran their final strongholds on Anglesey.

The coastline of Wales extends from the English border at Chepstow westwards to Pembrokeshire then north to Anglesey and back eastwards to the English border once again near Flint. Its character is determined by multiple factors, including the local geology and geological processes active during and subsequent to the last ice age, its relative exposure to or shelter from waves, tidal variation and the history of human settlement and development which varies considerably from one place to another. The majority of the coast east of Cardiff in the south, and of Llandudno in the north, is flat whilst that to the west is more typically backed by cliffs. The cliffs are a mix of sandstones, shales and limestones, the erosion of which provides material for beach deposits. Of the twenty-two principal areas which deliver local government in Wales, sixteen have a coastline, though that of Powys consists only of a short section of tidal river some distance from the open sea. Its length (including Anglesey) has been estimated at 1,680 miles (2,700 km).

A curtain wall is a defensive wall between fortified towers or bastions of a castle, fortress, or town.

The Roman conquest of Anglesey refers to two separate invasions of Anglesey in North West Wales that occurred during the early decades of the Roman conquest of Britain in the 1st century CE. The first invasion of North Wales began after the Romans had subjugated much of southern Britain. It was led by the Provincial governor of Britannia, Suetonius Paulinus, who led a successful assault on the island in 60–61 CE, but had to withdraw because of the Boudican revolt. In 77 CE, Gnaeus Julius Agricola's thorough subjugation of the island left it under Roman rule until the end of Roman rule in Britain in the early 5th century CE. Anglesey was invaded as it was an important centre for the Celtic Druids and their religious practices which made it a place of resistance to Roman rule.

No surviving Roman sources mention Anglesey, which was recorded in Latin as Mona (and is still known as Môn in modern Welsh), after its conquest. Archaeologists have located a fort dated shortly after the first conquest near Cemlyn Bay; a trading settlement on the shore of the Menai Strait; and a village of huts huddled together on a hill for defence. In the last decades of Roman rule in Britain several military forts were built on the northern and western coasts to defend the island against Irish sea raiders. However, despite more than three centuries of Roman rule, archaeologists have found no evidence of major civic centres or villas on the island, indicating that Romano-British culture lacked the influence it had in other parts of the Roman province of Britannia.

The Tudors of Penmynydd (Welsh: Tuduriaid Penmynydd) were a noble and aristocratic family, connected with the village of Penmynydd in Anglesey, North Wales, who were very influential in Welsh (and later English) politics. From this family arose Sir Owen Tudor and thereby the Tudor dynasty, that ruled the Kingdom of England from 1485 to 1603. The Tudor dynasty ended in the early 17th century with the death of Elizabeth I.