The Reformed churches are a group of Christian Protestant Denominations formally characterized by a similar Calvinist system of doctrine, historically related to the churches which first arose especially in the Swiss Reformation led by Huldrych Zwingli and soon afterward appeared in nations throughout Western and Central Europe. Each nation in which the Reformed movement was originally established had its own church government. Several of these national churches have expanded to worldwide denominations and most have experienced splits into multiple denominations. Commitment to teaching the original Calvinism usually continues to be reflected in their official definitions of doctrine, but in some cases is no longer necessarily typical of these churches. A 1999 survey found 746 Reformed denominations worldwide.
Reformed churches Wikipedia Entry