Fontaine, Pierre François Léonard (pyĕr fräNswäˈ lāōnärˈ fôNtĕnˈ) [key], 1762–1853, French architect. He was known chiefly for the work which, beginning in 1794, he did jointly with Charles Percier; the development of the Empire style in France was almost exclusively an expression of their talents. After Napoleon's fall the partnership dissolved (1814), and Fontaine thereafter practiced as court architect during the reigns of Louis XVIII, Charles X, and Louis Philippe. He laid out the Rue de Rivoli in Paris, enlarged the Palais Royal, of which he also wrote a history, and wrote a number of books on architecture.
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