The year 2013 will see a big anniversary: 450 years of Heidelberg Catechism. This Protestant confession was written in Heidelberg in 1563 on behalf of Frederick III, Elector Palatine and spread over the world when it was approved on the Synod of Dort in 1619. Since then the Heidelberg Catechism has shaped the spiritual and political life and became a symbol of change and departure from the old in Europe, America, and Asia. Even today the Heidelberg Catechism is the binding confession of the Reformed Church. It is in everyday use by more than 20 million people worldwide.In this exhibition book well known specialists in the field present how the Heidelberg Catechism spread and influenced culture, education and ecclesiastical life; they also show the context of its time and the courtly pomp of the electors and the House of Orange. Together with over 700 pictures illustrating the contributes and many objects in the exhibitions this documentation becomes an incomparable event!