Lycée Janson-de-Sailly is a lycée located in the 16th arrondissement of Paris, France. The lycéens of Janson are called les jansoniens and they usually refer to their high school as Janson, or JdS. It is the biggest academic institution in the region: 3,200 boys and girls from 11 to 20 attend classes ranging from junior high school to Classes Préparatoires. Source: Wikipedia (en)