<Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> The Celts (/ kɛlts, sɛlts /, see pronunciation of Celt for different usages) are an Indo - European ethnolinguistic group of Europe identified by their use of Celtic languages and cultural similarities . The history of the Celts stretches from the 2nd millenium BC up to the present day . </P> <P> The history of pre-Celtic Europe and the exact relationship between ethnic, linguistic and cultural factors in the Celtic world remains uncertain and controversial . The exact geographic spread of the ancient Celts is disputed; in particular, the ways in which the Iron Age inhabitants of Great Britain and Ireland should be regarded as Celts have become a subject of controversy . According to one theory, the common root of the Celtic languages, the Proto - Celtic language, arose in the Late Bronze Age Urnfield culture of Central Europe, which flourished from around 1200 BC . According to a theory proposed in the 19th century, the first people to adopt cultural characteristics regarded as Celtic were the people of the Iron Age Hallstatt culture in central Europe (c. 800--450 BC), named for the rich grave finds in Hallstatt, Austria . Thus this area is sometimes called the "Celtic homeland". By or during the later La Tène period (c. 450 BC up to the Roman conquest), this Celtic culture was supposed to have expanded by trans - cultural diffusion or migration to the British Isles (Insular Celts), France and the Low Countries (Gauls), Bohemia, Poland and much of Central Europe, the Iberian Peninsula (Celtiberians, Celtici, Lusitanians and Gallaeci) and northern Italy (Golasecca culture and Cisalpine Gauls) and, following the Celtic settlement of Eastern Europe beginning in 279 BC, as far east as central Anatolia (Galatians) in modern - day Turkey . </P> <P> The earliest undisputed direct examples of a Celtic language are the Lepontic inscriptions beginning in the 6th century BC . Continental Celtic languages are attested almost exclusively through inscriptions and place - names . Insular Celtic languages are attested beginning around the 4th century in Ogham inscriptions, although it was clearly being spoken much earlier . Celtic literary tradition begins with Old Irish texts around the 8th century CE . Coherent texts of Early Irish literature, such as the Táin Bó Cúailnge ("Cattle Raid of Cooley"), survive in 12th century recensions . </P>

Where were the celts said to have migrated from