Pierre Paul Royer-Collard, a French statesman and philosopher, born at Sompuis, Champagne, June 21, 1763, died at Châteauvieux, Loir-et-Cher, Sept. 4, 1845. He was an advocate, held office in Paris after the commencement of the revolution, and after Aug. 10, 1792, was proscribed as a moderate. In 1797 he was elected to the council of 500 by the -department of Marne, which he afterward represented in the chamber of deputies under the restoration and Louis Philippe. He was a liberal royalist, and the founder of the party of doctrinaires. The most eloquent of his discourses was delivered in 1825 against the proposed law of sacrilege, which would have required of every citizen a profession of the Roman Catholic faith. From 1811 till March, 1814, he was professor of the history of philosophy in the Sorbonne. In 1827 he succeeded Laplace as a member of the French academy. The master of Cousin and Jouffroy in speculative philosophy, and of Guizot and De Tocqueville in political science, he has left no permanent record of himself at all corresponding to his personal reputation and authority.

His philosophical writings, chiefly fragmentary, are published with Jouffroy's translation of the works of Reid. - See Vie politique de M. Royer-Collard, ses discours et ses écrits, by Barante (2 vols., Paris, 1861), and Vie de Royer-Collard, by M. de Lacombe (1863).