The history of Anglo-Saxon England covers the history of England from the end of Roman Britain and the establishment of Anglo-Saxon kingdoms in the fifth century until the Norman Conquest of England in 1066. The fifth and sixth centuries are known archaeologically as Sub-Roman Britain, or in popular history as the 'Dark Ages'; from the sixth century larger distinctive kingdoms are developing, still known by some as the Heptarchy. For most of this period England was split between areas controlled by the invading Anglo-Saxons and by the native celtic British. The arrival of the Vikings at the end of the eighth century brought many changes to Britain. Danish raiders attacked places throughout Britain but their later settlement was restricted to the eastern part of England, while Norwegian raiders attacked the west coast of both England and Wales. Eventually the Anglo-Saxons gained control of the whole of England, though there was a short intermission of Danish control. Relations with the continent were important right up to the end of Anglo-Saxon England: traditionally held to be the Norman Conquest.