The Heidelberg Catechism is a Protestant confessional document created in 1563 in the city of Heidelberg, Germany. It was designed to teach the principles of the Reformed Christian faith, particularly for the Reformed Church. The catechism is structured in a question-and-answer format, making it accessible for both adults and children. Divided into 52 sections, the catechism covers key topics such as the nature of God, sin, salvation, and the sacraments. It emphasizes the importance of faith and grace, reflecting the theological ideas of the Reformation. The Heidelberg Catechism remains influential in many Reformed communities today.