The casting says "Clotilde" but her name is misspelled (as "Clothilde", rather a common error in France) in the movie when we see the lines of name/debt written by the matron.
A character says he's been to the inauguration ceremony of the Paris Metro. After that there is a scene where we hear fireworks for Bastille Day (14 July). The opening of the Paris Metro (Line 1) was on 19 July 1900, five days after Bastille Day.