The Exposition Universelle of 1900 was a world's fair held in Paris, France, from 14 April to 12 November 1900, to celebrate the achievements of the past century and to accelerate development into the next. The style that was universally present in the Exposition was Art Nouveau. The fair, visited by nearly 50 million, displayed many machines, inventions, and architecture that are now nearly universally known, including the Grande Roue de Paris Ferris wheel, Russian nesting dolls, diesel engines, talking films, escalators, and the telegraphone (the first magnetic audio recorder). A collection of 59 amazing vintage photos will show you a panoramic view of the world's fair in 1900. (Photos from Robert Bonnin)