Bouillon Chartier, or simply Chartier, is a "bouillon" restaurant in Paris founded in 1896, located in the 9th arrondissement and classified as a monument historique since 1989.
Wikipedia https://en.wikipedia.org/wiki/Bouillon_Chartier
Official Website https://www.bouillon-chartier.com/en/bouillon-chartier-montparnasse-en/
Coordinates 48°51'10.639" N 2°20'14.751" E