After his death in 1632, Frederick's daughter Princess Elizabeth and wife Elizabeth Stuart, Queen of Bohemia, worked tirelessly to have the Palatinate restored to her son Charles Louis and the Protestant cause. When the Peace of Westphalia ended the war in 1648, he regained the Lower Palatinate and the title 'Elector Palatine' but now ranked lower in precedence than the others. He was succeeded by Charles II, Elector Palatine in 1680 but the Simmern family became extinct in the male line after he died in 1685.