The failure of negotiations between Emperor Louis IV and the papacy led to the 1338 Declaration at Rhense by six princes of the Imperial Estate to the effect that election by all or the majority of the electors automatically conferred the royal title and rule over the empire, without papal confirmation. As result, the monarch was no longer subject to papal approbation and became increasingly dependent on the favour of the electors. Between 1346 and 1378 Emperor Charles IV of Luxembourg, king of Bohemia, sought to restore imperial authority. The 1356 decree of the Golden Bull stipulated that all future emperors were to be chosen by a college of only seven – four secular and three clerical – electors. The secular electors were the King of Bohemia, the Count Palatine of the Rhine, the Duke of Saxony, and the Margrave of Brandenburg, the clerical electors were the Archbishops of Mainz, Trier, and Cologne.