Doctor Francis Sonnius had been sent on a mission to the Pope, for the purpose of representing the necessity of an increase in the episcopal force of the Netherlands. Just as the King was taking his departure, the commissioner arrived, bringing with him the Bull of Paul the Fourth, dated May 18, 1559. This was afterwards confirmed by that of Pius the Fourth, in January of the following year. The document stated that “Paul the Fourth, slave of slaves, wishing to provide for the welfare of the provinces and the eternal salvation of their inhabitants, had determined to plant in that fruitful field several new bishoprics. The enemy of mankind being abroad,” said the Bull, “in so many forms at that particular time, and the Netherlands, then under the sway of that beloved son of his holiness, Philip the Catholic, being compassed about with heretic and schismatic nations, it was believed that the eternal welfare of the land was in great danger. At the period of the original establishment of Cathedral churches, the provinces had been sparsely peopled; they had now become filled to overflowing, so that the original ecclesiastical arrangement did not suffice. The harvest was plentiful, but the laborers were few.”
In consideration of these and other reasons, three archbishoprics were accordingly appointed. That of Mechlin was to be principal, under which were constituted six bishoprics, those, namely, of Antwerp, Bois le Due, Rurmond, Ghent, Bruges and Ypres. That of Cambray was second, with the four subordinate dioceses of Tournay, Arras, Saint Omer and Namur. The third archbishopric was that of Utrecht, with the five sees of Haarlem, Middelburg, Leeuwarden, Groningen and Deventer.