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
Hyde Park, London of Trafalgar was re-enacted on the Serpentine, with a band playing the National Anthem while the French fleet sank into the lake. The coronation of King George IV in 1821 was celebrated with a fair in the park, including an air balloon and firework displays. One of the most important events to take place in Hyde Park was the Great Exhibition of 1851. The Crystal Palace was constructed on the south side of the park. The public did not want the building to remain after the closure of the exhibition, and its architect, Joseph Paxton, raised funds and purchased it.