In the early twenty-first century, the Louvre is the most visited museum in the world. Yet little is known about how visit numbers to French museums developed. Compared to the Anglo-Saxon world, the collection and publication of visit data began late and was initially far from systematic. Some figures were collected in the late nineteenth century, but correspondence from the early twentieth century indicates that not even the Ministry of Fine Arts, overseeing the National Museums, was always aware of them. More complete numbers appeared from 1922 when entrance fees were introduced. However, visitors entering on free days were not yet counted. In the 1930s, data collection for the National Museums was systematized by the Directorate of Natio...