Charles IV, first Bohemian King of that name, ruled from 1346 to 1378, so the building of Emaus covered pretty nearly all the years of his reign and in fact went back to the unhappy times before he ascended the throne. His father was evidently a difficult person to live with; not only his extravagance and erratic habits, but also a thoroughly unjustified suspicion of his elder son, must have caused the latter a great deal of misery. Instead of following the precedent of the Přemysls in dynastic disputes, Charles wisely abstained from open opposition to John, although the people's affection had been transferred from father to son. Added to this there were the usual troubles caused by the German Princes. John had never even been "placed" in the running for the imperial crown; goodness knows what would have happened if the weal of the Holy Roman Empire had depended on him. Louis of Wittelsbach, who contested the imperial throne with Frederick the Fair of Austria, and had beaten the latter handsomely at Muehldorf, was nevertheless none too safely seated, and became involved in the unending squabbles with the Papacy, aggravated in his case by the removal of the Pope to Avignon. John, of course, sided against Louis and with the Pope, so Louis joined with the German Princes in trying to deprive John Henry of the Tyrol and Carinthia, which the latter considered his property on marrying Margaret Maultasche; he was lucky enough to retain possession of the Tyrol while the Austrian Dukes kept Carinthia. That little matter settled, John went off and fought the Lithuanians again--he called it a crusade--and came home from that campaign without the sight of one eye, which he had lost through illness, a loss which soon led to complete blindness but not to any disinclination to go out anywhere and fight anyone. Father John must have been a considerable nuisance in the family. In the meantime Margaret added her mite to the general gaiety of nations by falling in love with Louis of Brandenburg, the handsome son of Emperor Louis; she counterbalanced this by a violent hatred of her husband, the unlucky John Henry. So Charles had his hands full, and he seems to have been the only level-headed member of the family. With all these troubles about him he nevertheless continued to manage the affairs of Bohemia and Moravia, to straighten out the finances of the Kingdom while finding sufficient pocket-money for his father's hobby of serving any other cause but his own, and also to soothe the ruffled feelings of John Henry and keep some of that Prince's property for the House of Luxemburg. It was during this hectic time that Charles managed to get the Pope to raise the Bishop of Prague to the rank of Archbishop, an important step, as it set the new Archbishopric free from that of Maintz and thus gave it an opportunity of developing on its own rather than on German lines. Count Lützow points out the absurdity of the situation