When walking along the Rue Saint Sulpice, you probably won't notice that the the numberplate on building 36 is larger and more colorful numberplate than the standard blue and white version.
What happened in this building to afford it a marking that stands out among the others?
If you were a Belle Epoque parisian man, you'll automatically recognize this oversized faience plate as a signal for a Maison Close, a house of pleasure.
This building, as large as the doorway, was Miss Betty's brothel, specialized in "dominatrix role play." The brothel was a very popular address among the extensive ecclesiastic crowd of the Saint Sulpice area. Priests were said to be particularly drawn to the "crucifixion parlor" and the “Satan's Hell” torture room.