was a quite indefinite region that extended along the English Channel coast from the Seine estuary, then along the Atlantic coast to the Loire estuary and, according to several sources, maybe to the Garonne estuary. This term probably comes from a Gallic word, aremorica, which means "close to the sea". Another name, Letauia (in English "Litavis"), was used until the 12th century. It possibly means "wide and flat" or "to expand" and it gave the Welsh name for Brittany: Llydaw. After the fall of the Western Roman Empire, many Britons settled in western Armorica, and the region started to be called Britannia, although this name only replaced Armorica in the sixth century or perhaps by the end of the fifth. Breton-speaking people may pronounce the word Breizh in two different ways, according to their region of origin. Breton can be divided into two main dialects: the KLT (Kerne-Leon-Tregor) and the dialect of Vannes. KLT speakers pronounce it and would write it Breiz, while the Vannetais speakers pronounce it and would write it Breih. The official spelling is a compromise between both variants, with a z and an h together. In 1941, efforts to unify the dialects led to the creation of the so-called Breton zh, a standard which has never been widely accepted. On its side, Gallo has never had a widely accepted writing system and several ones coexist. For instance, the name of the region in that language can be written Bertaèyn in ELG script, or Bertègn in MOGA, and a couple of other scripts also exist. History Prehistoric origins Brittany has been inhabited by humans since the Lower Palaeolithic. This population was scarce and very similar to the other Neanderthals found in the whole of Western Europe. Their only original feature was a distinct culture, called "Colombanian". One of the oldest hearths in the world has been found in Plouhinec, Finistère. Homo sapiens settled in Brittany around 35,000 years ago. They replaced or absorbed the Neanderthals and developed local industries, similar to the Châtelperronian or to the Magdalenian. After the last glacial period, the warmer climate allowed the area to become heavily wooded. At that time, Brittany was populated by relatively large communities who started to change their lifestyles from a life of hunting and gathering, to become settled farmers. Agriculture was introduced during the 5th millennium BC by migrants from the south and east. However, the Neolithic