The monks were no better than the secular clergy. The monasteries had grown large, for many men had joined in order to escape military service, or to obtain personal security, or an easier life, or greater social consideration; they had also grown rich, for many sinners on their deathbeds had given large sums, in hope to compound for their sins. Naturally monastic vows were often broken. Moreover, the little good that monks and priests did they undid by their encouragement of superstition. They first frightened the poor peasants out of their wits by portraying the horrors of hell, and then preached the magical properties of the sacraments and of saints' bones, until the ordinary man, feeling himself the sport of superhuman agencies, abandoned all self-confidence and surrendered himself to priestly control as his sole hope of safety in this world or the next. Oppressed by anarchy, by division, by a degenerate church, by a gross clergy, and by waxing ignorance, Italy might seem to have had its cup of evil full. There was but one further ill that could be added, a new Barbarian invasion. It came. The triumphant Saracens, having overrun Spain and raided France in the west, having cooped up the Byzantine Empire in the east, now threatened to plant their victorious banners in the very heart of Christendom. As early as Charlemagne's last years they sacked a coast town scarce forty miles from Rome. In 827 they invaded Sicily, invited by a partisan traitor. Within ten years they had made themselves masters of almost all the island, except a few strongholds which managed to hold out for half a century. The beaten Byzantines retired to the mainland; but they did not get beyond the reach of the victorious Saracens, who raided all the Italian coast as far as the Tiber. Troops of marauders hovered round Rome and harried the country-side, robbing and pillaging at will. One band advanced to the very gates of the city, and sacked St. Peter's and St. Paul's, both outside the walls and undefended (846). All the southern provinces were overrun, half of their towns became Saracen fortresses. It seemed as if Italy were to undergo the fate of Spain and become a Mohammedan Emirate.