Reaching Italy, he soon brought his affairs into order.  He had under his command an army of thirty thousand Saracen soldiers, with whom it was impossible for his enemies to tamper.  A bitter recrimination took place with the pope, in which the emperor managed to bring the general sentiment of Europe to his side, offering to convict Gregory of himself entering into negotiations with the infidels.  Gregory, finding that he was getting the worst of the controversy with his powerful and alert enemy, now prudently gave way, having a horror of the shedding of blood.  Peace was made in 1230, the excommunication removed from the emperor, and for nine years the conflict between him and the papacy was at an end.

We have told the story of Frederick’s crusade, but the remainder of his life is of sufficient interest to be given in epitome.  In his government of Sicily he showed himself strikingly in advance of the political opinions of his period.  He enacted a system of wise laws, instituted representative parliaments, asserted the principle of equal rights and equal duties, and the supremacy of the law over high and low alike.  All religions were tolerated, Jews and Mohammedans having equal freedom of worship with Christians.  All the serfs of his domain were emancipated, private war was forbidden, commerce was regulated, cheap justice for the poor was instituted, markets and fairs were established, large libraries collected, and other progressive institutions organized.  He established menageries for the study of natural history, founded in Naples a great university, patronized medical study, provided cheap schools, aided the development of the arts, and in every respect displayed a remarkable public spirit and political foresight.

Yet splendid as was his career of development in secular affairs, his private life, as well as his public conduct, was stained with flagrant faults, and there was much in his doings that was frowned upon by the pope.  New quarrels arose; new wars broke out; the emperor was again excommunicated; the unfortunate closing years of Frederick’s career began.  Again there were appeals to Christendom; again Frederick’s Saracens marched through Italy; such was their success that the pope only escaped by death from falling into the hands of his foe.  But with a new pope the old quarrel was resumed, Innocent IV. flying to France to get out of reach of the emperor’s hands, and desperately combating him from this haven of refuge.

The incessant conflict at length bowed down the spirit of the emperor, now growing old.  His good fortune began to desert him.  In 1249 his son Enzio, whom he had made king of Sicily, and who was the most chivalrous and handsome of his children, was taken prisoner by the Bolognese, who refused to accept ransom for him, although his father offered in return for his freedom a silver ring equal in circumference to their city.  In the following year his long-tried friend and councillor, Peter de Vincis, who had been the most trusted man in the empire, was accused of having joined the papal party and of attempting to poison the emperor.  He offered Frederick a beverage, which he, growing suspicious, did not drink, but had it administered to a criminal, who instantly expired.