The main site at 45 rue d'Ulm is organized around a central courtyard, the "Cour aux Ernests". Another courtyard south of this one, the "Cour Pasteur", separates the school from the apartment buildings of the "rue Claude-Bernard". These buildings house the administrative functions of the school, and some of its literary departments (philosophy, literature, classics and archeology), its mathematics and computer science departments, as well as its main human sciences library. The site's "monument aux morts", which was inaugurated in 1923 and stands as a reminder of the "normaliens" who lost their lives in the First World War, is a work by Paul Landowski.