He commissioned the first Paris Universal Exposition of 1855. Its purpose was to promote French commerce, technology and culture. It was followed by another in 1867, and, after the Emperor's downfall in 1870, another in 1878, celebrating national unity after the defeat of the Paris Commune, and then in 1889, celebrating the centennial of the French Revolution.[1][2] Planning for the 1900 Exposition began in 1892, under President Carnot.