This painting, which was displayed at the 1865 Salon (an art exhibition distinguished by the Academy of Fine Arts), shows the huge workshops of Jean-Louis Perin, future partner of the automobile-maker René Panhard, in the Faubourg Saint-Antoine quarter. Beneath an immense skylight, employees use saws (right) or mortising machines (left) to work on wooden parts. Twenty years after Eugène Philippe's model of a car-wheel workshop, the use of machines had become widespread in increasingly big factories.