The Baptistery can be traced several times to the 18th century: first in an inventory of the sacristy of the Sainte-Chapelle de Vincennes of 1739 and in the article "Vincennes" in "Description of Paris" by Jean-Aimar Piganiol of La Force, in 1742, in which he explains that the baptistery was located for some time at the Bâtme des Enfans de France and served at the baptism of Dauphin who later went on to reign as Louis XIII.