Le Fourcy was the most famous mass brothel of Paris, a so-called Maison d'abattage. It was located in the Saint-Paul district in the 4th arrondissement at 10 rue de Fourcy, and was notorious for treating its women very badly. In his book Le Petit Simonin, novelist Albert Simonin wrote:

"The Fourcy in the district of Saint-Paul, the most famous of the Paris slaughter houses, demanded 5.50 francs per session. "Five francs per lady and room," as if it were a chorus's chorus, who goes to the room? "The ten sous (fifty centimes), which were asked for as a supplement to the five francs, is not a tip, but a tariff for the towel attracted so many customers on working days that some ladies who were not too bad, were anything but unemployed and able to cope with seventy sessions."