Angelus Silesius, OFM, born Johann Scheffler, was a German Catholic priest, physician, mystic and religious poet. Born and raised a Lutheran, he began to read the works of medieval mystics while studying in the Netherlands and became acquainted with the works of the German mystic Jacob Böhme through Böhme's friend, Abraham von Franckenberg. Silesius's display of his mystic beliefs caused tension with Lutheran authorities and led to his eventual conversion to Catholicism in 1653, wherein he adopted the name Angelus and the epithet Silesius ("Silesian"). He took holy orders under the Franciscans and was ordained a priest in 1661. Ten years later, in 1671, he retired to a Jesuit house where he remained for the rest of his life.