The Paris Universal Exposition of 1889, celebrating the centenary of the French Revolution, was much larger than the 1878 Exposition, and gave Paris two revolutionary new structures; The Eiffel Tower was the tallest structure in the world, and became the symbol of the Exposition. The tower brought lasting fame to its constructor, Gustave Eiffel. The architects of the tower, including Stephen Sauvestre, who designed the graceful curving arches of the base, the glass observation platform on the second level and the cupola at the top, remain nearly unknown.