In the chapels of Saint-Louis are the tombs of Napoleons brothers Joseph and Jérôme, of his son (whose body was returned from Vienna in 1940 by Adolf Hitler), and of the marshals of France. Immediately beneath the cupola is a red porphyry sarcophagus that covers the six coffins enclosing the body of Napoleon I, which was returned from Saint-Helena in 1840 through the efforts of King Louis-Philippe. Napoleons uniforms, personal arms, and death bed are displayed in the rich Musée de l'Armée (Army Museum) at the front of the Invalides. Fewer than 100 pensioners now live at the hospital, which is used as a paraplegic centre.The grassy, tree-lined Esplanade des Invalides (810 feet wide) slopes gently for 1,410 feet to the Quai d'Orsay and the Pont Alexandre III. The first stone for the bridge was laid in 1897 by Alexanders son, Tsar Nicholas II.