Jacobus Arminius (ɑrˈmɪniəs; 10 October 1560 – 19 October 1609), the Latinized name of Jakob Hermanszoon, was a Dutch Reformed minister and theologian during the Protestant Reformation period whose views became the basis of Arminianism and the Dutch Remonstrant movement. He served from 1603 as professor in theology at the University of Leiden and wrote many books and treatises on theology. Following his death, his challenge to the Reformed standard, the Belgic Confession, provoked ample discussion at the Synod of Dort, which crafted the five points of Calvinism in response to Arminius's teaching. Arminius, was born in 1559 or 1560 in Oudewater, Utrecht. He became an orphan while still young. His father Herman, a manufacturer of weapons, died, leaving his wife a widow with small children. He never knew his father, and his mother was killed during the Spanish massacre at Oudewater in 1575. The child was adopted by Theodorus Aemilius, a priest inclined towards Protestantism. Around 1572 (the year Oudewater was conquered by the rebels), Arminius and Aemilius settled in Utrecht. The young Jacobus studied there, probably at the Hieronymusschool. After the death of Aemilius (1574 or 1575), Arminius became acquainted with the mathematician Rudolph Snellius, also from Oudewater. The latter brought Arminius to Marburg and enabled him to study at the Leiden University, where he taught. In 1576, Arminius was registered as a liberal arts student at the newly opened Leiden University. Arminius remained a student at Leiden from 1576 to 1582. Although he enrolled as a student in Liberal Arts, this allowed him to pursue an education in theology, as well. His teachers in theology included Calvinist Lambertus Danaeus, Hebrew scholar Johannes Drusius, Guillaume Feuguereius (or Feugueires, d. 1613), and Johann Kolmann. Kolmann is now known for teaching that the overemphasis of God's sovereignty in high Calvinism made God "a tyrant and an executioner". Although the university in Leiden was solidly Reformed, it had influences from Lutheran, Zwinglian, and Anabaptist views in addition to Calvinism.