The history of what is now Wales () begins with evidence of a Neanderthal presence from at least 230,000 years ago, while Homo sapiens arrived by about 31,000 BC. However, continuous habitation by modern humans dates from the period after the end of the last ice age around 9000 BC, and Wales has many remains from the Mesolithic, Neolithic, and Bronze Age. During the Iron Age the region, like all of Britain south of the Firth of Forth, was dominated by the Celtic Britons and the Brittonic language. The Romans, who began their conquest of Britain in AD 43, first campaigned in what is now northeast Wales in 48 against the Deceangli, and gained total control of the region with their defeat of the Ordovices in 79. The Romans departed from Britain in the 5th century, opening the door for the Anglo-Saxon invasion. Thereafter, the Brittonic language and culture began to splinter, and several distinct groups formed. The Welsh people were the largest of these groups, and are generally discussed independently of the other surviving Brittonic-speaking peoples after the 11th century. In the post-Roman period, a number of Welsh kingdoms formed in present-day Wales, including Gwynedd, Powys, Deheubarth, Brycheiniog, Ergyng and Gwent. While the most powerful ruler was acknowledged as King of the Britons (later Tywysog Cymru: Leader or Prince of Wales), and some rulers extended their control over other Welsh territories and into western England, none were able to unite Wales for long. Internecine struggles and external pressure from the English and later, the Norman conquerors of England, led to the Welsh kingdoms coming gradually under the sway of the English crown. In 1282, the death of Llywelyn ap Gruffudd led to the conquest of the Principality of Wales by King Edward I of England; since then, the heir apparent to the English monarch has borne the title "Prince of Wales". The Welsh launched several revolts against English rule, the last significant one being that led by Owain Glyndŵr in the early 15th century. In the 16th century Henry VIII, himself of Welsh extraction as a great-grandson of Owen Tudor, passed the Laws in Wales Acts aiming to fully incorporate Wales into the Kingdom of England. Under England's authority, Wales became part of the Kingdom of Great Britain in 1707 and then the United Kingdom of Great Britain and Ireland in 1801. Yet, the Welsh retained their language and