Lonis Bourdaloue, a French prelate and orator, born at Bourges, Aug. 20, 1632, died in Paris, May 13, 1704. At an early age he entered the society of Jesus, and became professor of rhetoric, philosophy, and moral theology in their college at Bourges, displaying remarkable capacity for oral instruction, as well as great energy of character. He first preached in provincial churches, and in 1669 was sent to Paris, where he became very popular. Louis XIV. on many occasions invited him to preach at Versailles. He reformed in a measure the somewhat theatrical pulpit oratory of his day, and restored it to greater simplicity, directness, and sincerity. For 20 years he continued a favorite preacher. Louis XIV. sent him to Languedoc to reconcile the Protestants to the repeal of the edict of Nantes. In the latter part of his life he chiefly devoted himself to charitable labors. His sermons, often published during his lifetime, and translated into many foreign languages, are remarkable for their solid learning and eloquence. The most celebrated of them is the sermon on the Passion. The edition by Pere Bretonneau, in 16 volumes, is generally considered the most complete and valuable.

Prominent among more recent editions is that of Didot (3 vols. 8vo, 1840).