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
Alexandra Park, London incepted in the 1850s to build an education, recreation and events venue to rival south London's Crystal Palace which took the main structure of the Great Exhibition, 1851 from Hyde Park, London. The Act therefore created the Alexandra Palace and Park Trust as to which the Trustees were bound to maintain the Palace and Park and make them available for the free use and recreation of the public forever. Until September 1970, Alexandra Park hosted horse racing, including many evening meetings that were televised by the BBC. The racecourse in the park grounds was nicknamed "the Frying Pan" owing to