Gerard van Groesbeeck
As a young man, he became a canon of Aachen Cathedral. He was also a canon, and later the dean of the cathedral chapter of St. Lambert's Cathedral, Liège. He became the coadjutor bishop of Robert of Berghes, Prince-Bishop of Liège in March 1562. He became the administrator of the Prince-Bishopric on April 11, 1564.
On June 5, 1564, he was elected Prince-Bishop of Liège; his election was preconized by Pope Pius IV on February 23, 1565. He was consecrated as a bishop by Gregoire Silvius, titular bishop of Tagaste, in the Cistercian Abbey of Herckenrode on May 20, 1565. As Prince-Bishop, he was not successful in implementing the decrees of the Council of Trent in the Prince-Bishopric. He succeeded in preventing Protestantism from spreading into the Prince-Bishopric. In 1567, he crushed revolts in Hasselt, Maaseik, and Maastricht. In 1576, he became Prince-Abbot of Stavelot. He and the Estates of Liège declared the Prince-Bishopric a neutral state in 1577.
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