The reasons for the creation for the figures are varied and obscure. The Uffington Horse probably held political significance, since the figure dominates the valley below. It probably dates to the British Iron Age since coins have been found exhibiting the symbol. The Cerne Abbas Giant might have been a work of political satire likely of the Early Modern period. Wiltshire is a county with a large number of White Horses; 14 have been recorded. The figures are usually created by the cutting away of the top layer of relatively poor soil on suitable hillsides. This exposes the white chalk beneath, which contrasts well with the short green hill grass, and the image is clearly visible for a considerable distance. Although most of the figures are of great age, many are relatively new. Devizes in Wiltshire created a large white horse for the 2000 Millennium celebrations and in October 2009 celebrated this with an aerial photo of volunteers making the figure 10 for an aerial photo.