Hôtel de Sully
If there's one thing I'm most definitely obsessed with it's beautiful Parisian courtyards. This one, inside Hôtel de Sully in Le Marais, is clearly one of my favourites. The best thing about it? It offers a calm and serene little shortcut to Place des Vosges, which is located on the other side of the red little door. If you get there early enough, you might even find yourself there all alone.