Kaspar Ulenberg (24 December 1549 – 16 February 1617) was a Catholic convert, theological writer and translator of the Bible. He was born at Lippstadt on the Lippe, Westphalia, the son of Lutheran parents, and was intended for the Lutheran ministry. He received his grammar-school education in Lippstadt, Soest, and Brunswick, and from 1569 studied theology at Wittenberg. While studying Luther's writings there his first doubts as to the truth of the Lutheran doctrines were awakened, and were then increased by hearing the disputes between the Protestant theologians and by the appearance of Calvinism in Saxony. After completing his studies he taught for a short time in the Latin school at Lunden in Dithmarschen; he was then sent by his family to Cologne to convert to Protestantism a kinsman wh