This is an image of the famous Arc de Triomphe de l’Etoile, or the Triumphal Arch of the Star, as it stands in the center of a roundabout in the Champs-Élysées.
The description on the back states:
PARIS… EN FLANANT
6 L’Arc de Triomphe de l’Étoile
–The title means Paris…while strolling. The arch was built to commemorate the heroes of the French Revolution and the Napoleonic Wars. One unknown soldier from World War One is buried beneath the arch.
This image likely dates from the 1930s.