 He supported Count Charles IV of Luxembourg as anti-king to Louis IV and on that account exclusively received the Saxon electoral dignity with the Golden Bull of 1356, thus slighting Saxe-Lauenburg.Saxe-Wittenberg thereupon came to be known as the Electorate of Saxony ("Kursachsen").When the Ascanian line in the Electorate of Saxony died out in 1422, the Ascanian Duke Eric V of Saxe-Lauenburg failed to assert his succession in Wittenberg.