By the time Ottokar I had settled himself firmly on the throne he found that the confused, almost anarchic, state which Germany had drifted into could mean many advantages to Bohemia, if the situation were properly handled. The House of Hohenstaufen began to go downhill after the death of Henry VI, and we find a lusty Welf, Otto, clamouring for the imperial diadem, assisted by a number of German Electors. This gave the ruler of Bohemia his opportunity, and Ottokar took it. His son Wenceslaus I and grandson Ottokar II followed the same line of policy, a purely dynastic one. They took sides with one or other of the rivals for the crown of the Holy Roman Empire, changing as considerations of domestic interests required, and making skilful use of the perennial quarrel between Empire and Papacy over the Investitures. While the Hohenstaufens were trickling out until the luckless Conradin lost his head at Naples, while fierce Welfs like Otto of Brunswick wrecked themselves on the rock of papal insistence, Bohemia's rulers were profiting. Ottokar I seems to have been particularly astute in this line of business. He supported two rival Emperors in turn and got something useful out of both, he upheld the cause of Pope Innocent III against one or other imperial rival and induced that pontiff to recognize the Přemysl's title to royalty. Ottokar even found himself sufficiently strong to try a throw with the Pope himself on the vexed subject of Investiture, simply by way of a little private sport on his own account and not as part of the general European brawl. It happened that Andrew, Bishop of Prague, was one of those didactic prelates who insisted on all the little things the Papacy was out for--immunity for his clerics from the temporal law-courts, from taxes, and so on. Above all, Andrew was strong on the right of conferring ecclesiatical office, albeit he had himself accepted investiture at the hands of Ottokar. This led to quite a hearty quarrel in which Andrew got the worst of it; he had to seek refuge in Rome, whence he let off all the customary fulminations, declaring Bohemia to be under interdict and so on. Nobody in Bohemia took the least notice of Andrew's little efforts; Church and people went solidly with their King on this occasion, and carried on their devotional exercises as before.