Celts, a large group of Indo-European tribes, whose territory of settlement in the second half of the first millennium BC stretched from the British Isles to Asia Minor. The Celts already inhabited the 2nd half of the 1st millennium B.C. in the territory of modern France, Belgium, Switzerland, southern Germany, Austria, northern Italy, northern and western Spain, the British Isles, the Czech Republic, partly Hungary and Bulgaria. They came from an ancient Indo-European community that had moved westwards to Europe before other Indo-Europeans. The movements of all Indo-Europeans can be figuratively compared to the fall of a snowball from the mountains, which at first is small, falling down, more and more growing, turns into a huge avalanche. Before that, the most ancient settlements of the ancient Indo-Europeans - the Varas attracted various wandering tribes, which settled around the ancient Vars, and gradually formed the backbone of the ancient Aryans (Indo-Europeans).