Type Of Constans
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The ''Typos'' of Constans (also called ''Type'' of Constans) was an edict issued by
eastern Roman emperor This is a list of the Byzantine emperors from the foundation of Constantinople in 330 AD, which marks the conventional start of the Eastern Roman Empire, to its fall to the Ottoman Empire in 1453 AD. Only the emperors who were recognized as le ...
Constans II Constans II ( grc-gre, Κώνστας, Kōnstas; 7 November 630 – 15 July 668), nicknamed "the Bearded" ( la, Pogonatus; grc-gre, ὁ Πωγωνᾶτος, ho Pōgōnãtos), was the Eastern Roman emperor from 641 to 668. Constans was the last ...
in 648 in an attempt to defuse the confusion and arguments over the
Christological In Christianity, Christology (from the Greek grc, Χριστός, Khristós, label=none and grc, -λογία, -logia, label=none), translated literally from Greek as "the study of Christ", is a branch of theology that concerns Jesus. Di ...
doctrine of
Monotheletism Monothelitism, or monotheletism (from el, μονοθελητισμός, monothelētismós, doctrine of one will), is a theological doctrine in Christianity, that holds Christ as having only one will. The doctrine is thus contrary to dyothelit ...
. For over two centuries, there had been a bitter debate regarding the nature of Christ: the orthodox Chalcedonian position defined Christ as having two natures in one person, whereas
Miaphysite Miaphysitism is the Christology, Christological doctrine that holds Jesus in Christianity, Jesus, the "Incarnation (Christianity), Incarnate Logos (Christianity), Word, is fully divine and fully human, in one 'nature' (''physis'')." It is a posi ...
opponents contended that Jesus Christ possessed but a single nature. At the time, the Byzantine Empire had been at near constant war for fifty years and had lost large territories. It was under great pressure to establish domestic unity. This was hampered by the large number of Byzantines who
rejected ''Rejected'' is an animated film directed by Don Hertzfeldt that was released in 2000. It was nominated for an Academy Award for Best Animated Short Film the following year at the 73rd Academy Awards, and received 27 awards from film festivals ...
the
Council of Chalcedon The Council of Chalcedon (; la, Concilium Chalcedonense), ''Synodos tēs Chalkēdonos'' was the fourth ecumenical council of the Christian Church. It was convoked by the Roman emperor Marcian. The council convened in the city of Chalcedon, Bith ...
in favour of Monophysitism. The ''Typos'' attempted to dismiss the entire controversy, on pain of dire punishment. This extended to kidnapping the Pope from Rome to try him for high treason and mutilating one of the ''Typos's'' main opponents. Constans died in 668. Ten years later his son,
Constantine IV Constantine IV ( la, Constantinus; grc-gre, Κωνσταντῖνος, Kōnstantînos; 650–685), called the Younger ( la, iunior; grc-gre, ὁ νέος, ho néos) and sometimes incorrectly the Bearded ( la, Pogonatus; grc-gre, Πωγων ...
, fresh from a triumph over his Arab enemies and with the predominantly Monophysitic provinces irredeemably lost, called the
Third Council of Constantinople The Third Council of Constantinople, counted as the Sixth Ecumenical Council by the Eastern Orthodox and Catholic Churches, as well by certain other Western Churches, met in 680–681 and condemned monoenergism and monothelitism as heretical a ...
. It decided with an overwhelming majority to condemn Monophysitism, Monotheletism, the ''Typos'' of Constans and its major supporters. Constantine put his seal to the Council's decisions, and reunited such of Christendom as was not under Arab suzerainty.


Background


Political background

In 628, the
Christian Christians () are people who follow or adhere to Christianity, a monotheistic Abrahamic religion based on the life and teachings of Jesus Christ. The words ''Christ'' and ''Christian'' derive from the Koine Greek title ''Christós'' (Χρι ...
Byzantine Empire The Byzantine Empire, also referred to as the Eastern Roman Empire or Byzantium, was the continuation of the Roman Empire primarily in its eastern provinces during Late Antiquity and the Middle Ages, when its capital city was Constantinopl ...
and the
Zoroastrian Zoroastrianism is an Iranian religion and one of the world's oldest organized faiths, based on the teachings of the Iranian-speaking prophet Zoroaster. It has a dualistic cosmology of good and evil within the framework of a monotheistic on ...
Sasanian Empire The Sasanian () or Sassanid Empire, officially known as the Empire of Iranians (, ) and also referred to by historians as the Neo-Persian Empire, was the History of Iran, last Iranian empire before the early Muslim conquests of the 7th-8th cen ...
of Iran ended a harrowing twenty-six-year-long war. Both states were completely exhausted. The Byzantines had had the majority of their territory overrun and a large part of it devastated. Consequently, they were vulnerable to the sudden emergence of the
Islam Islam (; ar, ۘالِإسلَام, , ) is an Abrahamic religions, Abrahamic Monotheism#Islam, monotheistic religion centred primarily around the Quran, a religious text considered by Muslims to be the direct word of God in Islam, God (or ...
ic
Rashidun Caliphate The Rashidun Caliphate ( ar, اَلْخِلَافَةُ ٱلرَّاشِدَةُ, al-Khilāfah ar-Rāšidah) was the first caliphate to succeed the Islamic prophet Muhammad. It was ruled by the first four successive caliphs of Muhammad after his ...
in
Arabia The Arabian Peninsula, (; ar, شِبْهُ الْجَزِيرَةِ الْعَرَبِيَّة, , "Arabian Peninsula" or , , "Island of the Arabs") or Arabia, is a peninsula of Western Asia, situated northeast of Africa on the Arabian Plate. ...
; the Caliphate's forces invaded both empires only a few years after the war. The Muslim, also known as Arab, forces swiftly conquered the entire Sasanian Empire and deprived the Byzantine Empire of its territories in the Levant, the Caucasus, Egypt, and North Africa. By 642, the Muslim armies had conquered all of Syria and Egypt, the richest parts of the Byzantine Empire. For a variety of reasons, the Byzantine population of Syria did not put up much resistance. High taxes, the power of the landowners over the peasants, and the recently ended war with the Persians were some of the reasons why the Syrians welcomed the change. "The people of
Homs Homs ( , , , ; ar, حِمْص / ALA-LC: ; Levantine Arabic: / ''Ḥomṣ'' ), known in pre-Islamic Syria as Emesa ( ; grc, Ἔμεσα, Émesa), is a city in western Syria and the capital of the Homs Governorate. It is Metres above sea level ...
replied
o the Muslims O, or o, is the fifteenth Letter (alphabet), letter and the fourth vowel letter in the Latin alphabet, used in the English alphabet, modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in ...
'We like your rule and justice far better than the state of oppression and tyranny in which we were. The army of Heraclius yzantiumwe shall indeed ... repulse from the city. Another key reason for the welcome of the Arabs as rulers by the Christian Syrians and Egyptians, is that they found the strict monotheism of Islam closer to their own Monophysite Christian position than the hated doctrine of Constantinople, which they perceived as
bitheism Dualism in cosmology or dualistic cosmology is the moral or spiritual belief that two fundamental concepts exist, which often oppose each other. It is an umbrella term that covers a diversity of views from various religions, including both traditi ...
. On 11 February 641
Heraclius Heraclius ( grc-gre, Ἡράκλειος, Hērákleios; c. 575 – 11 February 641), was List of Byzantine emperors, Eastern Roman emperor from 610 to 641. His rise to power began in 608, when he and his father, Heraclius the Elder, the Exa ...
, emperor for 31 years, who had pulled the Empire back from the brink of ruin, died. In the following three years, the Empire endured four short-lived emperors or usurpers before seventeen-year-old Constans II, grand-son of Heraclius, established himself on the throne of the diminished realm.Lilie et al pp. 70–71 In 643–644, Valentinus led a campaign against the Arabs, but his army was routed, he fled, and his treasury was captured. In 644 or 645, Valentinus attempted to usurp his son-in-law's throne. He failed, the populace of the capital lynching his envoy Antoninos before killing Valentinus himself.The Byzantine Empire seemed to be tearing itself apart with internecine strife, while the "human tsunami"Howard-Johnston (2006), xv of Arab conquest swept on.


Theological background

The
Council of Chalcedon The Council of Chalcedon (; la, Concilium Chalcedonense), ''Synodos tēs Chalkēdonos'' was the fourth ecumenical council of the Christian Church. It was convoked by the Roman emperor Marcian. The council convened in the city of Chalcedon, Bith ...
, the Fourth Ecumenical Council, was held in 451 and laid the basis of Christological belief; Christ was a single person possessing two natures: a perfect God and a perfect man united "unconfusedly, unchangeably, indivisibly and inseparably". This was viewed as outright heresy by
Monophysites Monophysitism ( or ) or monophysism () is a Christological term derived from the Greek (, "alone, solitary") and (, a word that has many meanings but in this context means "nature"). It is defined as "a doctrine that in the person of the incar ...
who, briefly, believe that Jesus Christ is "one person and one hypostasis in one nature: divine". Monophysite belief was widespread in Egypt and, to a lesser extent, Syria. The Byzantine state had repeatedly attempted to stamp it out. Emperor Heraclius spent the last years of his life attempting to find a compromise theological position between the Monophysites and the
Chalcedonians Chalcedonian Christianity is the branch of Christianity that accepts and upholds theological and ecclesiological resolutions of the Council of Chalcedon, the Fourth Ecumenical Council, held in 451. Chalcedonian Christianity accepts the Christolog ...
. What he promoted via his
Ecthesis The Ecthesis ( el, Ἔκθεσις) is a letter published in 638 CE by the Byzantine emperor Heraclius which defined monotheletism as the official imperial form of Christianity. Background The ''Ecthesis'' was another attempt by the Byzantine empe ...
was a doctrine which declared that
Jesus Jesus, likely from he, יֵשׁוּעַ, translit=Yēšūaʿ, label=Hebrew/Aramaic ( AD 30 or 33), also referred to as Jesus Christ or Jesus of Nazareth (among other names and titles), was a first-century Jewish preacher and religious ...
, whilst he possessed two distinct natures, had only one will; the question of the energy of Christ was not relevant. This approach seemed to be an acceptable compromise, and it secured widespread support throughout the east.
Pope Honorius I Pope Honorius I (died 12 October 638) was the bishop of Rome from 27 October 625 to his death. He was active in spreading Christianity among Anglo-Saxons and attempted to convince the Celts to calculate Easter in the Roman fashion. He is chiefl ...
and the four
Patriarch The highest-ranking bishops in Eastern Orthodoxy, Oriental Orthodoxy, the Catholic Church (above major archbishop and primate), the Hussite Church, Church of the East, and some Independent Catholic Churches are termed patriarchs (and in certai ...
s of the East – Constantinople, Alexandria, Antioch and Jerusalem – all gave their approval to the doctrine, referred to as
Monothelitism Monothelitism, or monotheletism (from el, μονοθελητισμός, monothelētismós, doctrine of one will), is a theological doctrine in Christianity, that holds Christ as having only one will. The doctrine is thus contrary to dyothelit ...
, and so it looked as if Heraclius would finally heal the divisions in the church. The
Pope The pope ( la, papa, from el, πάππας, translit=pappas, 'father'), also known as supreme pontiff ( or ), Roman pontiff () or sovereign pontiff, is the bishop of Rome (or historically the patriarch of Rome), head of the worldwide Cathol ...
s in
Rome , established_title = Founded , established_date = 753 BC , founder = King Romulus (legendary) , image_map = Map of comune of Rome (metropolitan city of Capital Rome, region Lazio, Italy).svg , map_caption ...
objected. Pope Honorius I died in 638 and his successor
Pope Severinus Pope Severinus (died 2 August 640) was the bishop of Rome elected in October 638. He was caught up in a power struggle with Emperor Heraclius, who pressured him to accept Monothelitism. Severinus refused, which for over eighteen months hindered ...
condemned the ''Ecthesis'' outright, and so was forbidden his seat by Constans until 640. His successor
Pope John IV Pope John IV ( la, Ioannes IV; died 12 October 642) was the bishop of Rome from 24 December 640 to his death. His election followed a four-month vacancy. He wrote to the clergy of Ireland and Scotland to tell them of the mistakes they were maki ...
also rejected the doctrine completely, leading to a major schism between the eastern and western halves of the Catholic Church. When news of the Pope's condemnation reached Heraclius, he was already old and ill, and the news is said to have hastened his death. Meanwhile, there were problems in the province of
Africa Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area ...
. Since the fall of Egypt it was in the front line against Arab expansionism. Nominally a Byzantine province, in practice Africa was all but independent and a hotbed of dissent to Constantinople's Monotheletist policies. The threat of imminent invasion increased the local bishops' antipathy to Monophysitism, knowing that its adherents in Syria and Egypt had welcomed the invading Arabs. The compromise policy of Monotheletism was disliked as giving comfort to those seen theologically as heretics and politically as potential traitors. A monk named
Maximus the Confessor Maximus the Confessor ( el, Μάξιμος ὁ Ὁμολογητής), also spelt Maximos, otherwise known as Maximus the Theologian and Maximus of Constantinople ( – 13 August 662), was a Christian monk, theologian, and scholar. In his earl ...
had long carried on a furious campaign against Monotheletism, and in 646 convinced an African council of bishops, all resolutely Chalcedonian, to draw up a manifesto against it. This they forwarded to the new pope, Theodore I, who in turn wrote to
Patriarch Paul II of Constantinople Paul II (died 27 December, 653) was the Ecumenical Patriarch of Constantinople from 1 October 641 to his death. He assumed regency A regent (from Latin : ruling, governing) is a person appointed to govern a state '' pro tempore'' (Latin: 'f ...
, outlining the heretical nature of the doctrine. Paul, a devoted Monothelete, replied in a letter directing the Pope to adhere to the doctrine of one will. Theodore in turn
excommunicated Excommunication is an institutional act of religious censure used to end or at least regulate the communion of a member of a congregation with other members of the religious institution who are in normal communion with each other. The purpose ...
the Patriarch in 649, declaring Paul a heretic. The divisions in Byzantine society and the open opposition to imperial authority were starkly exposed.


Constans issues the ''Typos''

Constans II was a young man of seventeen, and he was supremely indifferent to the religious debates convulsing the Church. However, he was certainly concerned about the effect the arcane debate was having on his empire. A key reason for the parlous position of the Byzantine Empire was the religious divide. He had just established an uncertain truce with the Arabs, and badly needed to rebuild his forces and to gain the full support of his empire. So he issued an imperial
edict An edict is a decree or announcement of a law, often associated with monarchism, but it can be under any official authority. Synonyms include "dictum" and "pronouncement". ''Edict'' derives from the Latin edictum. Notable edicts * Telepinu Proc ...
, called the ''Typos'' ( el, τύπος, typos) in 648. This edict made it illegal to discuss the topic of Christ possessing either one or two wills, or one or two energies; or even to acknowledge that such a debate was possible. He declared that the whole controversy was to be forgotten. During the proceedings of the
Lateran Council of 649 The Lateran Council of 649 was a synod held in the Basilica of St. John Lateran to condemn Monothelitism, a Christology espoused by many Eastern Christians. The Council did not achieve ecumenical status in either East or West, but represented the ...
the text of the ''Typos'' was read out in full and so is preserved in the recorded ''Acts''. The first section expresses concern that some subjects of the empire consider Christ to have had one will, and some that he had two. This is discussed, and concluded with the observation that the debate is dividing society and that Constans intends to put a stop to this. The ''Typos'' goes on to deny people "the licence to conduct any dispute, contention or controversy", explaining that whole matter has been settled by the five previous ecumenical councils "and the straight forwardly plain statements... of the approved holy fathers". The right of any individual to interpret their findings is explicitly forbidden. "The situation that existed previously... is to be maintained everywhere, as if no quibbling had arisen over them." There is to be an amnesty for any past comments on the topic, and all writings regarding it are to be destroyed. In the third and final section, various penalties were prescribed for anyone who disobeys the imperial decree.
Bishops A bishop is an ordained clergy member who is entrusted with a position of authority and oversight in a religious institution. In Christianity, bishops are normally responsible for the governance of dioceses. The role or office of bishop is ca ...
or clerks of the church are to be deposed. Monks are to be excommunicated, while public servants or military officers are to lose their office. Private citizens of senatorial rank would have their property confiscated. Finally, if any of the great mass of the citizenry so much as mentioned the topic, they would face corporal punishment and banishment for life.


Opposition

In Rome and the west, the opposition to Monotheletism was reaching fever pitch, and the ''Typos'' of Constans did nothing to defuse the situation; indeed it made it worse by implying that either doctrine was as good as the other. Theodore planned the
Lateran Council of 649 The Lateran Council of 649 was a synod held in the Basilica of St. John Lateran to condemn Monothelitism, a Christology espoused by many Eastern Christians. The Council did not achieve ecumenical status in either East or West, but represented the ...
to condemn the ''Ecthesis'', but died before he could convene it; his successor,
Pope Martin I Pope Martin I ( la, Martinus I, el, Πάπας Μαρτίνος; between 590 and 600 – 16 September 655), also known as Martin the Confessor, was the bishop of Rome from 21 July 649 to his death 16 September 655. He served as Pope Theodore I's ...
, did. Not only did the Council condemn the ''Ecthesis'', it condemned the ''Typos'' as well. After the synod, Pope Martin wrote to Constans, informing the emperor of its conclusions and requiring him to condemn both the Monothelete doctrine and his own ''Typos''. However, Constans was not the sort of emperor to take such a rebuke of imperial authority lightly. Constans sent a new
Exarch of Ravenna The Exarchate of Ravenna ( la, Exarchatus Ravennatis; el, Εξαρχάτο της Ραβέννας) or of Italy was a lordship of the Eastern Roman Empire (Byzantine Empire) in Italy, from 584 to 751, when the last exarch was put to death by the ...
, Olympius, who had authority over all Byzantine territory in Italy, which included Rome. He had firm instructions to ensure that the ''Typos'' be followed in Italy, and to use whatever means necessary to ensure that the Pope adhere to it. Arriving while the Lateran Synod was sitting, he realised how opposed the west was to the emperor's policy and set up Italy as an independent state; his army joined his rebellion. This made it impractical for Constans to take effective action against Pope Martin, until after Olympius died three years later. Constans appointed a new Exarch,
Theodore I Calliopas Theodore Calliopas ( la, Theodorus Calliopus or ''Theodorus Calliopas''; el, Θεόδωρος Καλλιοπάς, Theódōros Kalliopás) was Exarch of Ravenna from 643 to 645 and again from 653 to shorty before 666. Nothing is known of Theodore' ...
, who marched on Rome with the newly loyal army, abducted Pope Martin and brought him to Constantinople where he was tried for high treason before the
Senate A senate is a deliberative assembly, often the upper house or chamber of a bicameral legislature. The name comes from the ancient Roman Senate (Latin: ''Senatus''), so-called as an assembly of the senior (Latin: ''senex'' meaning "the el ...
; he was banished to
Chersonesus Chersonesus ( grc, Χερσόνησος, Khersónēsos; la, Chersonesus; modern Russian and Ukrainian: Херсоне́с, ''Khersones''; also rendered as ''Chersonese'', ''Chersonesos'', contracted in medieval Greek to Cherson Χερσών; ...
(present-day
Crimea Crimea, crh, Къырым, Qırım, grc, Κιμμερία / Ταυρική, translit=Kimmería / Taurikḗ ( ) is a peninsula in Ukraine, on the northern coast of the Black Sea, that has been occupied by Russia since 2014. It has a pop ...
) and shortly after died as a result of his mistreatment. In an unusual move, a successor,
Pope Eugene I Pope Eugene I ( la, Eugenius I; died 2 June 657) was the bishop of Rome from 10 August 654 to his death. He was chosen to become Pope after the deposition and banishment of Martin I by Emperor Constans II over the dispute about Monothelitism. ...
, was elected in 654 by the College of Cardinals while Martin I still lived. The new pope normalized relations with Constantinople, and although he avoided pressing the issues of the Christological controversy, he ceremonially refused to accept a letter from the Patriarch of Constantinople when the imperial emissary attempted to deliver it.Ekonomou, 2007, pp. 159–161. Constans viewed settling the dispute as a matter of state security, and persecuted anyone who spoke out against Monotheletism, including Maximus the Confessor and a number of his disciples. Maximus was tortured over several years; he lost his tongue and his right hand as Constans attempted to force him to recant. Constans even personally journeyed to Rome in 663 to meet with the Pope, the first emperor to visit since the
fall of the Western Roman Empire The fall of the Western Roman Empire (also called the fall of the Roman Empire or the fall of Ancient Rome, Rome) was the loss of central political control in the Western Roman Empire, a process in which the Empire failed to enforce its rul ...
.


Condemnation

With Constans' death in 668, the throne passed to his son
Constantine IV Constantine IV ( la, Constantinus; grc-gre, Κωνσταντῖνος, Kōnstantînos; 650–685), called the Younger ( la, iunior; grc-gre, ὁ νέος, ho néos) and sometimes incorrectly the Bearded ( la, Pogonatus; grc-gre, Πωγων ...
.
Pope Vitalian Pope Vitalian ( la, Vitalianus; died 27 January 672) was the bishop of Rome from 30 July 657 to his death. His pontificate was marked by the dispute between the papacy and the imperial government in Constantinople over Monothelitism, which Rome ...
, who had hosted the visit of Constans II to Rome in 663, almost immediately declared himself in favour of the doctrine of the two wills of Christ, the orthodox Chalcedonian position. In response, Patriarch
Theodore I of Constantinople Theodore I (? – 28 January 687) was the Ecumenical Patriarch of Constantinople from 677 to 679. He had been preceded by Constantine I of Constantinople. During this cataclysmic period, the Byzantine military overcame the Arab incursion again ...
and Macarius, Patriarch of Antioch, both pressed Constantine to take measures against the Pope. Constantine, however, was fully occupied with military matters and saw no profit in reigniting this debate. In 674, the Arabs commenced the great
siege of Constantinople The following is a list of sieges of Constantinople, a historic city located in an area which is today part of Istanbul, Turkey. The city was built on the land that links Europe to Asia through Bosporus and connects the Sea of Marmara and the ...
which lasted four years before they were defeated. With the pressure from external enemies at least temporarily relieved, Constantine was able to turn to church affairs. With the predominantly Monophysitist provinces permanently lost to the Arabs, he was under less pressure to support any compromise which included their position. He decided to put the Monotheletic question to a Church Council. Constantine suggested this to the Pope in 678, and the proposal was welcomed. This council, the
Sixth Ecumenical Council The Third Council of Constantinople, counted as the Sixth Ecumenical Council by the Eastern Orthodox and Catholic Churches, as well by certain other Western Churches, met in 680–681 and condemned monoenergism and monothelitism as heretical ...
, met for ten months from 680 to 681. It hosted 174 delegates from every corner of
Christendom Christendom historically refers to the Christian states, Christian-majority countries and the countries in which Christianity dominates, prevails,SeMerriam-Webster.com : dictionary, "Christendom"/ref> or is culturally or historically intertwine ...
. The Patriarchs of Constantinople and Antioch were present in person, while the Pope and the Patriarchs of Alexandria and Jerusalem sent representatives. It held 18 plenary sessions; Constantine chaired the first 11, carefully expressing no opinion. On 16 September 681, it nearly unanimously condemned the Monotheletic doctrine and the ''Typos'' of Constans, with the exception of two delegates. Constantine personally signed the final declaration and was hailed as Destroyer of Heretics. Monotheletism was outlawed, and the non-Arab Christian world was united. One of the patriarchs anathematised (excommunicated) as heretics for their support of the ''Typos'' was Pope Honorius. The issue of a Pope being disowned by his own successors has caused difficulty for Catholic theologians ever since, especially when discussing
papal infallibility Papal infallibility is a dogma of the Catholic Church which states that, in virtue of the promise of Jesus to Peter, the Pope when he speaks ''ex cathedra'' is preserved from the possibility of error on doctrine "initially given to the aposto ...
.


See also

*
Dyothelitism Dyothelitism or dithelitism (from Ancient Greek, Greek δυοθελητισμός "doctrine of two wills") is a particular Christological doctrine that teaches the existence of two wills (divine and human) in the person of Jesus Christ. Specifical ...
*
Miaphysite Miaphysitism is the Christology, Christological doctrine that holds Jesus in Christianity, Jesus, the "Incarnation (Christianity), Incarnate Logos (Christianity), Word, is fully divine and fully human, in one 'nature' (''physis'')." It is a posi ...


Notes, citations and sources


Notes


Citations


Sources

* * * Ekonomou, Andrew J., ''Byzantine Rome and the Greek Popes: Eastern influences on Rome and the papacy from Gregory the Great to Zacharias, A.D. 590–752''. Lanham, MD. Lexington Books. (2007) * * Howard-Johnston, J.D., ''East Rome, Sasanian Persia and the End of Antiquity : Historiographical and Historical Studies''. Farnham : Ashgate (2006) * * * * * * * * {{DISPLAYTITLE:''Typos'' of Constans Christianity in the Byzantine Empire Christology 7th-century Christianity Non-Chalcedonianism 640s in the Byzantine Empire 648 650s in the Byzantine Empire 660s in the Byzantine Empire 670s in the Byzantine Empire 680s in the Byzantine Empire