About McD even if there is many in the city, expecially in busy place when I took my pictures, don't confuse the M sign of the metro (exemple : Avenue de Fontainebleau or Boulevar Barbes picture) with the M of McD.
These are really similar sometime people confuse it, in an other way in the center when there is McD there is subway station near.
Rue de L'Echiquier de Metz (10th arrondissement)
Forum des Halles (1st arrondissement)