This small stone building stands apart from the grander classical buildings in Vieille Ville. This tiny shop is a remnant of the original Fort Isarn, making it the oldest structure in the city. For the last few centuries it has served as an alchemy shop, being passed down from master to apprentice for centuries. This shop is known for providing the highest quality alchemical goods. It is run by Catherine Monvoisin, the polite if somewhat unsettling matron of the shop.