Swindon Works of the Great Western Railway (1841–1986) was one of the largest covered areas in the world, and its remains are amongst the most significant of Victorian engineering works in the world. Together with the housing and amenities provided by the company and its workforce, it has been proposed to UNESCO as the centre of a World Heritage Site. Swindon has also been significant in other manufacturing, such as the car industry: see History of Swindon. Parliamentary representation In 1295 Wiltshire was represented by no fewer than twenty-eight members in parliament: the shire returning two knights, and the boroughs of Bedwyn, Bradford, Calne, Chippenham, Cricklade, Devizes, Downton, Ludgershall, Malmesbury, Marlborough, Old Sarum, Salisbury and Wilton, two burgesses each, but the boroughs for the most part made irregular returns. Hindon, Heytesbury and Wootton Bassett were enfranchised in the 15th century, and at the time of the Reform Act of 1832 the county with sixteen boroughs returned a total of thirty-four members. Under the latter act Great Bedwyn, Downton, Heytesbury, Hindon, Ludgershall, Old Sarum and Wootton Bassett were disfranchised, and Calne, Malmesbury, Westbury and Wilton lost one member each. Under the act of 1868 the county returned two members in two divisions, and Chippenham, Devizes and Marlborough lost one member each. Under the act of 1885 the county returned five members in five divisions; Cricklade, Calne, Chippenham, Devizes, Malmesbury, Marlborough, Westbury and Wilton were disfranchised; and Salisbury lost one member. Archaeology Prehistoric remains and monuments Wiltshire is extraordinarily rich in prehistoric antiquities. The Stone Age is represented by a number of flint and stone implements, preserved in the unsurpassed collection at Salisbury Museum. Stonehenge, with its circles of giant stones, and Avebury, with its avenues of monoliths leading to what was once a stone circle, surrounded by an earthwork and enclosing two lesser circles, are the largest and best known megalithic works in England and indeed Europe. A valley near Avebury is filled with immense sarsen blocks, resembling a 'river of stone', and perhaps laid there by prehistoric architects. There are also menhirs, dolmens and cromlechs. Surrounded as they were by forests and marshy hollows, it is clear that the downs were densely peopled at a very early period. Circles, formed by a ditch within a bank, are common, as are grave-mounds or barrows. These have been classified according to their shape as bell barrows, bowl barrows and long barrows. Bones,