I was on a walk to Invalides.
from Wiki: “Les Invalides, officially known as L’Hôtel national des Invalides, or also as L’Hôtel des Invalides, is 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.
“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, most notably Napoleon Bonaparte.”