The Heidelberg Catechism has been admired for its clarity as an expression of the Reformed Christian faith as well as for its warm, personal tone. Many of its questions and answers-- and especially Q&A 1-- have been memorized by thousands and have become an anchor for faith. This 450th Anniversary Edition of the Heidelberg Catechism is a fresh and accurate translation from the 1563 German and Latin texts. It is also an ecumenical effort in that it is recommended for use in Reformed and Presbyterian churches today. This development fits the catechism's original purpose for not only teaching the faith but also uniting various churches by means of a common confession.