Heidelberg Catechism

The Heidelberg Catechism was written in Heidelberg at the request of Elector Frederick III, ruler of the most influential German province, the Palatinate, from 1559 to 1576. The Heidelberg Catechism was adopted by a Synod in Heidelberg and published in German with a preface by Frederick III, dated January 19, 1563. A second and third German edition, each with some small additions, as well as a Latin translation were published in Heidelberg in the same year.