Églies Saint-Étienne du Mont
This side entrance of Saint-Étienne
are closed but the ornate doorway is stunning.
Many will recognize it from the movie "Midnight in Paris"
Built between 1492 and 1626, the light interior is filled with cherubs and angels.
I would put it high on your list.
Église Saint-Étienne du Mont
1, place Ste-Geniviève