The Palace of Westminster serves as the meeting place for both the House of Commons and the House of Lords, the two houses of the Parliament of the United Kingdom. Informally known as the Houses of Parliament, the Palace lies on the north bank of the River Thames in the City of Westminster, in central London, England.
Sir Charles Barry's collaborative design for the Palace of Westminster uses the Perpendicular Gothic style, which was popular during the 15th century and returned during the Gothic revival of the 19th century. Barry was a classical architect, but he was aided by the Gothic architect Augustus Pugin. Westminster Hall, which was built in the 11th century and survived the fire of 1834, was incorporated in Barry's design. Pugin was displeased with the result of the work, especially with the symmetrical layout designed by Barry; he famously remarked, "All Grecian, sir; Tudor details on a classic body".
In 1839 Charles Barry toured Britain, looking at quarries and buildings, with a committee which included two leading geologists and a stonecarver. They selected Anston, a sand-coloured magnesian limestone quarried in the villages of Anston, South Yorkshire, and Mansfield Woodhouse, Nottinghamshire. Two quarries were chosen from a list of 102, with the majority of the stone coming from the former. A crucial consideration was transportation, achieved on water via the Chesterfield Canal, the North Sea, and the rivers Trent and Thames. Furthermore, Anston was cheaper, and "could be supplied in blocks up to four feet thick and lent itself to elaborate carving".en.wikipedia.org