Michael Harrison - The Old Faith Regenerated
Abbot hildebrand (born 1013), who reigned as Pope Gregory VII from 1073-1085, was the first Pope effectively to set about realising the second phase of the plan to regain, in the Papacy, the temporal authority of the Roman Empire. Though Gregory was deposed in 1085, in favour of the 'anti-Pope', Clement III, the Roman Church had no fault to find with the rejected Pope's pro-Vatican legislation. It might have rejected the Pope; it did not reject his political theories. It was happy that Gregory had subjugated the power of the German 'Holy Roman Emperors'; it was more than content with the device by which Gregory had prevented any further alienation of Church property - the imposition of the rule of celibacy on all Roman Catholic clerics.