(Top left) Electronic display of the Paris "RER" express train. (Top right) When taking the express, be sure to check the platform's electronic board for direction and station names. (Bottom) Cultural and performance ads at every Paris metro station.

The subway is a highly effective area for advertising, with thousands of people rushing in and out every day.

Chatelet Les Halles is the core, largest, and most complex station in the Paris metro system.

The walls at the Musée d'Orsay station on the RER C line are decorated with works by French narrative realist artists from the 1970s.

Large subway posters for the special exhibition of Ingres, painter at the Louvre Museum.

Posters full of sensuality and provocation.

Posters full of sci-fi elements and imaginative space.

Artistic posters like these provide the best visual stimulation for urban residents.