Due to Calvin's missionary work in France, his programme of reform eventually reached the French-speaking provinces of the Netherlands. Calvinism was adopted in the Electoral Palatinate under Frederick III, which led to the formulation of the Heidelberg Catechism in 1563. This and the Belgic Confession were adopted as confessional standards in the first synod of the Dutch Reformed Church in 1571. Leading divines, either Calvinist or those sympathetic to Calvinism, settled in England (Martin Bucer, Peter Martyr, and Jan Łaski) and Scotland (John Knox). During the English Civil War, the Calvinistic Puritans produced the Westminster Confession, which became the confessional standard for Presbyterians in the English-speaking world. Having established itself in Europe, the movement continued to spread to other parts of the world including North America, South Africa, and Korea.[13]