George Cassander (or Cassant) (1513 – 3 February 1566) was a Flemish Catholic theologian and humanist. Life Born at Pittem near Bruges, he went at an early age to Leuven, where he was graduated in 1533. In 1541 he was appointed professor of belles-lettres at Bruges, but resigned two years later, partly from a natural desire to travel for instruction, and partly in consequence of the opposition aroused by his pro-Reformation views. On his journeys, which were undertaken in the company, and at the expense of his friend, Cornelius Wouters, he visited Rome, and in 1544 came to Cologne, where he settled permanently in the summer of 1549. He soon abandoned the classics for the study of the Bible and ecclesiastical questions, and had already published several classical, Biblical, and patristic treatises, when in 1556 he commenced a series of liturgical works. After a profound study of the points of difference between the Catholic and reformed churches, he devoted himself to the project of reunion, thus anticipating the efforts of Gottfried Leibniz. Jacques Auguste de Thou described Cassander as "...modest, void of arrogance; and he was as ardent in his wishes for a religious union, and made as many concessions for the accomplishment for this object, as could be expected from a person who continued in the Catholic communion." He died at Cologne on 3 February 1566. The collected edition of his works was published in 1616 at Paris. Works Cassander's activity in promoting religious peace between Catholics and Protestants began in 1561 with the publication of his anonymous book: De officio pii viri in hoc religionis dissidio. This work, written at the request of the jurist, François Baudouin, and submitted by him to the Colloquy of Poissy (Sept., 1561), gave offence to both sides. While holding that no one, on account of abuses, has a right utterly to subvert the Church, Cassander does not disguise his dislike of those who exaggerated the papal claims. He takes his standpoint on Scripture explained by tradition and the fathers of the first six centuries. He did not expect full reconciliation but proposed that Churches agree on "the elements of Apostolic doctrine". At a time when controversy drowned the voice of reason, such a book pleased neither party; but as some of the German princes thought that he could heal the breach, the emperor Ferdinand asked him to publish his Consultatio de Articulis