Constans II

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Constans II (Greek: Κώνστας Β', Kōnstas II ), also called "Constantine the Bearded" (Kōnstantinos Pogonatos), (November 7, 630September 15, 668) was Byzantine emperor from 641 to 668.

Constans is a diminutive nickname given to the emperor, who had been baptized Herakleios and reigned officially as Constantine. The nickname established itself in Byzantine texts, and has become standard in modern historiography.


Constans was the son of Constantine III, and due to the rumours that Heraklonas and Martina had poisoned Constantine III he was named co-emperor in 641. Later that same year his uncle was deposed and Constans II was left as sole emperor.

Constans owed his throne to a popular reaction against his uncle and to the protection of the soldiers led by the general Valentinus. Although the precocious emperor addressed the senate with a speech blaming Heraklonas and Martina for eliminating his father, he reigned under a regency of senators led by Patriarch Paul II of Constantinople. In 644 Valentinus attempted to seize power for himself but failed.

Under Constans, the Byzantines completely withdrew from Egypt in 642, and the Arab Caliphate launched numerous attacks on the islands of the Mediterranean and Aegean Sea. A Byzantine fleet under the admiral Manuel occupied Alexandria again in 645, but after an Arab victory the following year this had to be abandoned. The situation was complicated by the violent opposition to Monothelitism by the clergy in the west, and the related rebellion of the exarch of Carthage, Gregory. The latter fell in battle against the Arabs, but imperial rule was only restored by paying off the invaders.

Constans attempted to steer a middle line in the church dispute between Orthodoxy and Monothelitism, by refusing to persecute either and prohibiting further discussion of the natures of Jesus Christ by decree in 648. Naturally, this live-and-let-live compromise satisfied few passionate participants in the dispute.

Meanwhile, the Arab advance continued unabated. In 647 they had entered into Armenia and Cappadocia, and sacked Caesarea Mazaca. In 648 the Arabs raided into Phrygia and in 649 launched their first maritime expedition against Crete. A major Arab offensive into Cilicia and Isauria in 650651 forced the emperor to enter into negotiations with the Caliphate's governor of Syria, Muawiyah. The truce that followed allowed a short respite, and made it possible for Constans to hold on to the western portions of Armenia.

In 654, however, Muawiyah renewed his raids by sea, and plundered Rhodes. Constans led a fleet to attack the Arabs at Phoinike (off Lycia) in 655, but it was defeated: 500 Byzantine ships were destroyed in the battle, and the emperor himself risked to be killed. The Arabs were preparing to attack Constantinople, but did not carry out the plan when civil war between the future Sunni and Shi'a factions broke out among them.

With the eastern frontier under less pressure, in 658 Constans defeated the Slavs in the Balkans, temporarily reasserting some notion of Byzantine rule over them. In 659 he campaigned far to the east, taking advantage of a rebellion against the Caliphate in Media. The same year he concluded peace with the Arabs.

Now Constans could turn to church matters once again. Pope Martin I had condemned both Monothelitism and Constans' attempt at a compromise. Now the emperor ordered his exarch of Ravenna to arrest the pope. One exarch excused himself from this task, but his successor carried it out in 653. The pope was brought to Constantinople and condemned as a criminal, ultimately being exiled to Cherson, where he died in 655.

Constans grew increasingly fearful that his younger brother, Theodosios, could oust him from the throne: he therefore obliged him first to take the orders and later had Theodosios killed in 660. Constans' sons Constantine, Herakleios, and Tiberios had been associated on the throne since the 650s. However, having attracted the hatred of citizens of Constantinople, Constans decided to leave the capital and to move to Syracuse in Sicily.

From here, in 661, he launched an assault against the Lombard Duchy of Benevento, which then occupied most of Southern Italy. Taking advantage of the fact that Lombard king Grimoald I of Benevento was engaged against the forces of Ebroin, Mayor of the Palace of Neustria who was the power behind the throne of Clotaire III, Constans II disembarked at Taranto and besieged Lucera and Benevento. However, the latter resisted and Constans withdrew to Naples, while part of his army was destroyed by the Beneventani at Forino, between Avellino and Salerno.

In 663 Constans visited Rome for 12 days—no emperor having set foot in Rome for two centuries—and was received with great honor by Pope Vitalian (657–672). Although on friendly terms with Vitalian, he stripped buildings, including the Pantheon, of their ornaments and bronze to be carried back to Constantinople, and declared the Pope of Rome to have no jurisdiction over the Archbishop of Ravenna, since that city was the seat of the exarch, his immediate representative.

His subsequent moves in Calabria and Sardinia were marked by further strippings and request of tributes that enraged his Italian subjects. Rumours that he was going to move the capital of the empire to Syracuse were probably fatal for Constans. On September 15, 668 he was assassinated in his bath by his chamberlain. His son Constantine succeeded him as Constantine IV, a brief usurpation in Sicily by Mezezios being quickly suppressed by the new emperor.


By his wife Fausta, a daughter of the patrician Valentinus, Constans II had three sons:

  • Constantine IV, who succeeded as emperor
  • Herakleios, co-emperor from 659 to 681
  • Tiberios, co-emperor from 659 to 681


Preceded by:
Byzantine Emperor
Succeeded by:
Constantine IV

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