RESUMO
After a few epidemics of pestis in the XVth century, the authority decided to erect a new hospital far from the heart of the city of Paris with an adapted architecture to isolation of contagious patients. All the buildings of the hospital were built in the same time and the result is homogeneous. The architecture is characterized by a central quadrilateral, four buildings in square, a chapel and few others pavilions. To maintain isolation, many galleries communicate to the squares and the stores. We can also find a cistern, a pavilion for the baths and one consecrated to the treatment of the leprosy and erected by the Order of Knighthood of Malta. All these edifices are scheduled as an ancient monument and actually don't receive patients but are hallowed to research, formation or meeting. A new hospital has been erected at the back of the old one.