This is the very easy to miss Tower of Fearless John Duke of Burgundy, he lived from 1371 to 1419. It's in the 2nd arrondissement in Paris on Rue Etienne Marcel very close to Rue Montorguiel. The tower is actually called "Tour Jean sans Peur" and is Paris' only fortified medieval tower.
Can you see the pigeon in flight? I just now noticed it.