Exposition internationale de l'eau
The Exposition internationale de la technique de l'eau de 1939 was the third specialized exposition recognized by the Bureau International des Expositions. In 1936 Georges Truffaut proposed an exposition to celebrate the completion of the Albert Canal. The exposition's theme was water management and opened on 20 May 1939 by King Leopold III of Belgium. The canal itself was opened on 30 July 1939.