In 1931, the publishing house Horizons de France entrusted François Kollar (1904-1979), a Slovak photographer who had settled in Paris in 1924, with a vast photographic commission on the world of work, at a time when France was undergoing a real social, economic and industrial transformation. For four years, he criss-crosses the country’s roads, taking more than 10,000 photos, of which 2,000 are gathered in 15 booklets called La France travaille.It is a universe previously ignored by the image, which Kollar’s objective thus highlights: that of the women and men of the land, the factory, the workshop, the mine, the railway, the trades of the sea, etc. The photographer has them pose in their professional environment, highlighting their body, their gesture, their know-how but also their greatness and dignity. Kollar carries on them a sensitive look, imbued with humanism. His images are of a striking aesthetic force, playing with the originality of the shooting angles, the inventiveness in terms of framing, the taste for composition, the omnipresence of the machine. Unanimously praised, this photographic work knows a very great success.An original and aesthetic look at the world of work on the eve of the Front populaire, La France travaille also offers François Kollar a major place in the history of photography between the two wars.