Conrad Vorstius was a German-Dutch heterodox Remonstrant theologian, and successor to Jacobus Arminius in the theology chair at Leiden University. His appointment, and the controversy surrounding it, became an international matter in the political and religious affairs of the United Provinces during the Twelve Years' Truce, supplying a pretext for the irregular intervention of King James I of England in those affairs. Vorstius published theological views which were taken to show sympathy with the Socinians, and was declared a heretic at the Synod of Dort in 1619.