 Complete the following phrase:  The counts palatine of the Rhine held the office of imperial vicars in the territories under Frankish law in Franconia, Swabia and the Rhineland and ranked among the most significant secular Princes of the Holy Roman Empire. In 1541 elector Otto Henry converted to Lutheranism. Their climax and decline is marked by the rule of Elector Palatine Frederick V, whose coronation as king of Bohemia in 1619 sparked the Thirty Years War. After the 1648 Peace of Westphalia, the ravaged lands were further afflicted by the 