The Bois de Boulogne is a large public park that is the western half of the 16th arrondissement of Paris, near the suburb of Boulogne-Billancourt and Neuilly-sur-Seine. The land was ceded to the city of Paris by the Emperor Napoleon III to be turned into a public park in 1852. It is the second-largest park in Paris, slightly smaller than the Bois de Vincennes on the eastern side of the city.