 It is thus that this area is sometimes called the "Celtic homeland".By or during the later La Tène period (c. 450 BC to the Roman conquest), named after the La Tène site in Switzerland, 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.The earliest undisputed direct examples of a Celtic language are the Lepontic inscriptions beginning in the 6th century BC.