From Duffy's History of the Popes:
"Unworldliness, however, was no better protection for the papacy. The saintly Dominican Benedict XIII (1724-30) had resigned a dukedom to become a friar. He was elected Pope in the stalemated Conclave of 1724 because everybody knew he was unworldly, and would preserve neutrality between France, Spain and the Austrian Habsburgs. He was unworldly and he did try to be neutral. But he also refused to behave like a pope, instead behaving like a simple parish priest, living in a whitewashed room, visiting hospitals, hearing Confessions and teaching children their catechism. Meanwhile, he put all the affairs of the papacy into the hands of his secretary, Niccolo Coscia. Coscia was totally corrupt, and surrounded himself with a disreputable parcel of cronies and profiteers. The administration of the Papal States became a public scandal. Nepotism had been formally abolished by Pope Clement XI, but now the Church had all the evils of nepotism without the nephew.
In 1728 Benedict provided more evidence that unworldliness can be a bad thing in a pope. He commanded the compulsory celebration of the Feast of St Gregory VII, formerly a local Italian observance, by the universal Church. The breviary lesson prescribed for the Feast was tactless in the extreme, and praised Gregory's courage in excommunicating and deposing Henry IV. The states of Europe set up a howl of anger.
Venice protested to the Pope, Sicily (and Protestant Holland) forbade the celebration of the Feast at all, Belgium banned the offending lesson, the Parisian police prevented the breviary containing the service being printed. The ancient claim of the Pope to temporal power was no longer acceptable in 1728."