Baltard. I. Louis Pierre, a French architect and engraver, born in Paris, July 9, 1765, died Jan. 22, 1846. He was architect of the Pantheon and of the Paris prisons, and executed the chapels of the houses of detention of St. Lazare and Ste. Pelagie, the greater part of the hall of justice in Lyons, and other remarkable buildings; was a member of the board of public works, and in 1818 became professor at the academy of fine arts. He left many superb works descriptive of monuments and illustrated by his own plates; published the "Athe-naeum," a journal of art; and excelled in the engraving of historical and miscellaneous subjects. II. Victor, son of the preceding, born in Paris, June 19, 1805. He studied under his father and in Italy, became architect of the government and of the city of Paris, and chief superintendent in the academy of fine arts. He directed many court festivals, re- stored some of the principal churches of Paris, built the church of St. Augustine, which was opened in 1868, and was the architect of the central halls in Paris. He has continued the publication of the Grands prix d'architecture, which had been begun by his father; prepared under the patronage of the duke de Luynes the plates for a work on Norman and Swabian monuments in Italy; and published the text and designs of the Villa Medicis (1847- 8), and other works.

One of his earlier productions, Le theatre de Pompei, executed in Italy in 1837, gained him a medal at the Paris exposition of 1855; and his Projet de restauration de Saint Eustache was greatly admired at that of 1859. He was chosen a member of the academy of fine arts in 1803. III Prosper, brother of the preceding, born in Paris, Nov. 1, 1796, is also an excellent architect, and became in 1850 inspector of the new Louvre buildings. IV. Jules, a third brother, born in Paris, June 3, 1807, is a portrait painter.