Crystal Palace Dinosaurs listed buildings from 1973, extensively restored in 2002, and upgraded to Grade I listed in 2007. The models represent fifteen genera of extinct animals, not all dinosaurs. They are from a wide range of geological ages, and include true dinosaurs, ichthyosaurs, and plesiosaurs mainly from the Mesozoic era, and some mammals from the more recent Cenozoic era. Following the closure of the Great Exhibition in October 1851, Joseph Paxton's Crystal Palace was bought and moved to Penge Place atop Sydenham Hill, South London by the newly formed Crystal Palace Company. The grounds that surrounded it were then extensively renovated and
Royal Commission for the Exhibition of 1851 its chief administrator was Henry Cole. The current president is Anne, Princess Royal. The exhibition was a great popular and financial success, and made a huge surplus of £186,000 (approximately £22m in today's money). An unusual decision was made to maintain the Royal Commission as a permanent administrative body to use the profits for charitable purposes. Its revised Charter charged the Commission with "increasing the means of industrial education and extending the influence of science and art upon productive industry". The profit from the 1851 Exhibition was invested by The Commissioners who bought of land in South Kensington that was