 His further plans to restore the Imperial rule and to invade the Kingdom of Naples were aborted by his sudden death the next year.Successive emperors in the 14th and 15th centuries were bound in the struggle between the rivaling Luxembourg, Habsburg and Wittelsbach dynasties.In the conflict with Frederick the Fair, King Louis IV (reigned until 1347) had himself crowned Emperor in Rome by Antipope Nicholas V in 1328.