Example image of eyePlorer eyePlorer map for 'Frederick William I, Elector of Brandenburg': 1620 1688 April 29 Duchy of Prussia Duke February 16 Margraviate of Brandenburg Prince-elector House of Hohenzollern Calvinism Frederick I of Prussia Kingdom of Prussia Peace of Westphalia Berlin Elizabeth Charlotte of the Palatinate (1597–1660) George William, Elector of Brandenburg County of Mark Duchy of Cleves Catholic Church Holy Roman Empire Protestantism Thirty Years' War France Subsidy Allegiance Holy Roman Emperor Polish–Lithuanian Commonwealth Treaty of Labiau Treaty of Oliva Treaty of Wehlau Brandenburg-Pomeranian conflict Northern War Scanian War Swedish Pomerania Treaty of Saint-Germain-en-Laye (1679) Prussian Army Battle of Warsaw (1656) Louis XIV of France Battle of Fehrbellin Great Sleigh Drive Mission-type tactics General War Commissariat Joachim Friedrich von Blumenthal Mercantilism Public works Brandenburg-Prussia Edict of Nantes Edict of Potsdam French people Huguenot