opera, new ed., 1633); in 1613 and 1614 the discourses of Themistius and Julian (new ed., 1630); in 1616 the Breviarium historicum Nicephori; then, after some poetical and oratorical works, an edition of Epiphanius in two volumes (1622; new ed., 1632), which had been undertaken at the advice of Jacques Gretser, S.J., and was originally intended only as a revised translation of Janus Cornarius. In 1622 and 1623 appeared the Mastigophores, three pamphlets, and the notes dealing with Saumaise's Tertullian, a bitter polemical work. Among his previous writings, Pétau had inserted some masterly dissertations on chronology; in 1627 he brought out his De doctrina temporum, and later the Tabulae chronologicae (1628, 1629, 1633, 1657). It surpassed Scaliger's De Emendatione temporum (Paris, 1583), and prepared the ground for the works of the Benedictines. A summary of it appeared in 1633 (1635, 1641, etc.) under the title of Rationarium temporum, of which numerous reprints and translations into French, English, and Italian have been made. About the same time he wrote poetical works in Greek and in Latin and dissertations (often of a polemical nature) against Grotius, Saumaise, Arnauld, and others. His paraphrase of the Psalms in Greek verse was dedicated in 1637 to Pope Urban VIII. Finally there appeared in 1643 the first three volumes of the Dogmata theologica (dated 1644); the fourth and fifth volumes were published in 1650; the work was incomplete at Pétau's death, and despite several attempts was never continued. Numerous editions of the "Dogmata theologica" have been published, including that by the Calvinist Jean Le Clerc, published in Antwerp in 1700; the last edition was brought out in eight volumes by J. B. Fournials (Paris, 1866–68). In 1757 F. A. Zaccaria, S.J., republished the work in Venice with notes and dissertations; in 1857 Passaglia and Schrader undertook a similar work, but they produced only the first volume. His letters, Epistolarum libri tres, were published after his death; though far from being complete, they give an idea of his close acquaintance with the most famous men in Europe of his time; they also furnish valuable information on the composition of his works and his method. Petau's claim to fame chiefly rests on his vast, but unfinished, De theologicis dogmatibus, the first systematic attempt ever made to treat the development of Christian doctrine from the historical point of view. The reputation Pétau enjoyed during his lifetime was especially due