Caspar Erasmus (Erich) Schieler (July 14, 1851 – January 13, 1934) was a German theologian, church historian and priest in the late 19th century and early 20th century. According to documents provided by Mainz Cathedral and the Diocesan Seminary, Schieler studied philosophy and theology at the Episcopal Seminary in Mainz (closed during the Kulturkampf in 1878), receiving the Doctor of Divinity degree. Schieler first served as a priest at the age of twenty-five at Mainz, Cathedral ordained under Bishop Wilhelm Emmanuel von Ketteler in the year 1876. Due to the Kulturkampf, Schieler was interrogated by the German government and forced to pastor his parish in secret, to avoid further attention. While secretly pastoring in Weisskirchen, Schieler began working on his dissertation: Magister Joha