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
Palace never called "palaces"; although the formal name for the "Houses of Parliament" is the Palace of Westminster, this reflects Westminster's former role as a royal residence and centre of administration. In more recent years, the word has been used in a more informal sense for other large, impressive buildings, such as The Crystal Palace of 1851 (an immensely large, glazed hall erected for The Great Exhibition) and modern arenas-convention centers like Alexandra Palace. The largest in the world is the Palace of the Parliament in Bucharest, Romania. Built during the socialist regime, no effort or expense was spared to raise