Example image of eyePlorer eyePlorer map for 'Electorate of Saxony': Holy Roman Empire Prince-elector Kingdom of Saxony Saxe-Wittenberg Duchy of Saxony Elbe Wittenberg Albert the Bear Kingdom of Prussia Margraviate of Brandenburg Lauenburg/Elbe Saxe-Lauenburg Charles IV, Holy Roman Emperor Golden Bull of 1356 Holy Roman Emperor King of the Romans Primogeniture Frederick II, Elector of Saxony House of Ascania House of Wettin Margraviate of Meissen Otto I, Holy Roman Emperor Thuringia Personal union 1485 August 26 Leipzig Albert III, Duke of Saxony Royal house Protestant Reformation Frederick III, Elector of Saxony Martin Luther University of Halle-Wittenberg 1517 Indulgence October 31 The Ninety-Five Theses Diet of Worms Pope Leo X Imperial ban Wartburg Worms, Germany John, Elector of Saxony Lutheranism Charles V, Holy Roman Emperor Schmalkaldic League John Frederick I, Elector of Saxony Hildesheim Naumburg 1547