Constantine IV

Constantine's father, Constans II, died in 668 while in Sicily, and immediately some Sicilian bishops wanted someone else to take over, even though Constans had made his son co-emperor years before (in 654, when Constantine was four years old), marking his son as the rightful successor. The bishops did so because they considered Constans a heretic for his tacit support of Monothelitism. The bishops' choice—the Armenian Mizizios, a general in the Byzantine army—was not the choice of Pope Vitalian.

Reportedly, Mizizios did not want the position, but he stayed at the head of this rebellion for seven months until Constantine led an expedition to Sicily to suppress the rebels, killing Mizizios and the man who killed Constans. On the other hand, the Liber Pontificalis ("Book of Popes") recorded that it was the Exarchate of Africa (a Byzantine administrative district) that suppressed the revolt and sent Mizizios' head to Constantinople. (Years later, Mizizios' son John also rebelled in Sicily, and we are told Constantine went to Sicily to stop him; this revolt lasted seven months. It is possible that early historical records have conflated these two rebellions.)

With this slightly rocky start, the 18-year-old emperor went on to reign for 17 years. As well as rebellion to the west, he had to focus on danger from the east. There was a desire by an Umayyad Caliph, Muawiyah I, to overthrow the emperor in Constantinople. Carthage and Sicily were attacked in 667. Fleets captured or attacked other coastal cities for the next two years, and by the start of 668, Constantinople was besieged by both a land army and a fleet.

The countryside was ravaged, but the city itself was merely blockaded, not attacked. It became a waiting game. By June of 668, the Arab armies encamped around Constantinople were running out of food and malnourished. Famine followed, and an outbreak of smallpox caused the leaders to lift the siege and retreat to the town Cyzicus across the water. They continued to raid outlying Byzantine territory until they returned to Syria in 669/70.

Although he had done nothing to oppose the invaders except keep the city together, Constantine's popularity rose after the unsuccessful siege. He had other problems, however, including an economic crisis, which we'll talk about tomorrow.

Pagan Pope

Pope Innocent I was an early-5th century Italian pope. The Liber Pontificalis ["Book of Popes"] says he was the son of a man who was also named Innocent. It is believed, however, that the Liber was composed over a hundred years after Innocent's death—and its purpose seems to be one of papal propaganda—and so its accuracy is often questioned. Jerome, who was a contemporary of Innocent and wrote about the popes, claims Innocent was the son of Pope Anastasius I (died 19 December 401), who was Innocent's immediate predecessor as pope—a unique occurrence.

He was mentioned in Daily Medieval previously, when John Cassian appealed to him on behalf of the exiled (St.) John Chrysostom. This opportunity to weigh in would have pleased Innocent: he seemed to be concerned with formalizing and centralizing the authority of the Catholic Church in the person of the pope. He also wrote to various bishops, "confirming" authority they had been granted by previous popes, and thereby establishing the papacy itself as the authority. Through various letters (that still exist), we see Innocent using Roman Catholic practices to settle disputes and establish discipline and policy in far-flung dioceses.

Innocent did everything he could to quell heresies among the faithful, such as Montanism, which seemed to differ from mainstream Christianity in that inspiration received directly from the Holy Spirit superseded any words of Jesus or the popes; and Pelagianism, which taught that Original Sin did not stain each human, that Adam died through natural causes (and not because Sin had flawed him), that good works were possible without God's grace, and other beliefs.

So what's this rumor about allowing pagan practices (reported by the historian Zosimus)?

Well, Innocent was in Rome when Alaric I and the Goths arrived, bringing Arianism. Although the Goths respected Roman culture and wanted to rule it rather than destroy it, they so thoroughly overwhelmed the Roman forces and civil structure that perhaps there was pressure to accommodate their Arianism, and this is what Zosimus refers to. As it happens, Catholic Christianity was so ingrained in Roman society by that time that apparently there was no noteworthy rise in pagan ceremonies.

Innocent died on 12 March, 417. He was succeeded by Pope Zosimus (no relation to the historian), who also struggled with Pelagianism.