ANDRADE DE PAIVA, DIOGO. - Illustrious Portuguese theologian, b. at Coimbra in 1528, d. at Lisbon in 1575. He taught at the University of his native city. In 1561 he was sent by King Sebastian of Portugal, as his theologian, to the Council of Trent.
He published seven volumes of sermons in Portuguese, not entirely irreproachable, since, among other things, the author admits the salvation of ancient philosophers by virtue of a vague knowledge of the Redeemer, and also a book: *De Conciliorum auctoritate*. But what rendered him most famous was the activity he displayed against the Protestants and notably against Martin Chemnitz, in two works: *Orthodoxarum explanationum libri decem* (Venice 1564), and *Defensio Tridentinae Fidei Catholicae* (Lisbon 1578).