This photo was taken from the top of the Tour Montparnasse and shows Les Invalides, a complex of buildings containing museums and monuments, all relating to the military history of France, as well as a hospital and a retirement home for war veterans, the building's original purpose (project initiated by Louis XIV in 1670).
The buildings house the Musée de l'Armée, the military museum of the Army of France, the Musée des Plans-Reliefs, and the Musée d'Histoire Contemporaine, as well as the burial site for some of France's war heroes.
The most notable tomb at Les Invalides is that of Napoleon Bonaparte (1769-1821). Napoleon was initially interred on Saint Helena, but King Louis-Philippe arranged for his remains to be brought to St Jerome's Chapel in Paris in 1840. A renovation of Les Invalides took many years, but in 1861 Napoleon was moved to the most prominent location under the dome at Les Invalides. But one can also find tombs of other notorious persons like Claude Joseph Rouget de Lisle (1760 - 1836), army captain, author of France's national anthem, La Marseillaise, Ferdinand Foch (1851 - 1929), Marshal of France, Allied Supreme Commander in the First World War, Philippe Leclerc de Hautecloque (1902 - 1947), Marshal of France, hero of World War II, commander of the famous 2nd Armored Division, Jean de Lattre de Tassigny (1889 - 1952), Marshal of France, commander of the French First Army during World War II, etc..