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Photios I ( el, Φώτιος, ''Phōtios''; c. 810/820 – 6 February 893), also spelled PhotiusFr. Justin Taylor, essay "Canon Law in the Age of the Fathers" (published in Jordan Hite, T.O.R., & Daniel J. Ward, O.S.B., "Readings, Cases, Materials in Canon Law: A Textbook for Ministerial Students, Revised Edition" ollegeville, MN: The Liturgical Press, 1990, p. 61 (), was the
ecumenical patriarch of Constantinople The ecumenical patriarch ( el, Οἰκουμενικός Πατριάρχης, translit=Oikoumenikós Patriárchēs) is the archbishop of Constantinople ( Istanbul), New Rome and ''primus inter pares'' (first among equals) among the heads of th ...
from 858 to 867 and from 877 to 886. He is recognized in the
Eastern Orthodox Church The Eastern Orthodox Church, also called the Orthodox Church, is the second-largest Christian church, with approximately 220 million baptized members. It operates as a communion of autocephalous churches, each governed by its bishops vi ...
as Saint Photios the Great. Photios is widely regarded as the most powerful and influential church leader of Constantinople subsequent to
John Chrysostom John Chrysostom (; gr, Ἰωάννης ὁ Χρυσόστομος; 14 September 407) was an important Early Church Father who served as archbishop of Constantinople. He is known for his preaching and public speaking, his denunciation of a ...
's archbishopric around the turn of the fifth century. He is also viewed as the most important intellectual of his time – "the leading light of the ninth-century renaissance". He was a central figure in both the conversion of the Slavs to Christianity and the Photian schism, and is considered " e great systematic compiler of the Eastern Church, who occupies a similar position to that of Gratian in the West," and whose " collection in two parts...formed and still forms the classic source of ancient Church Law for the Greek Church." Photios was a well-educated man from a noble Constantinopolitan family. Photios's great uncle was a previous patriarch of Constantinople, Saint Tarasius. He intended to be a monk, but chose to be a scholar and statesman instead. In 858, Emperor Michael III (r. 842–867) decided to confine Patriarch Ignatius in order to force him into resignation, and Photios, still a layman, was appointed to replace him.. Amid power struggles between the pope and the Byzantine emperor, Ignatius was reinstated. Photios resumed the position when Ignatius died (877), by order of the Byzantine emperor. The new pope, John VIII, approved Photios's reinstatement. Catholics regard as legitimate a
Fourth Council of Constantinople (Roman Catholic) The Fourth Council of Constantinople was the eighth ecumenical council of the Catholic Church held in Constantinople from October 5, 869, to February 28, 870. It was poorly attended, the first session by only 12 bishops and the number of bishops ...
anathematizing Photios, while Eastern Orthodox regard as legitimate a subsequent Fourth Council of Constantinople (Eastern Orthodox), reversing the former. The contested councils mark the end of unity represented by the first seven Ecumenical Councils. Photios was canonized by the Eastern Orthodox Church in 1847.


Secular life

Most of the primary sources treating Photios's life are written by persons hostile to him. The chief contemporary authority for the life of Photios is his bitter enemy, Nicetas the Paphlagonian, the biographer of his rival Ignatios. Modern scholars are thus cautious when assessing the accuracy of the information these sources provide. Little is known of Photios's origin and early years. It is known that he was born into a notable family and that his uncle Saint Tarasius had been the patriarch of Constantinople from 784–806 under both Empress
Irene Irene is a name derived from εἰρήνη (eirēnē), the Greek for "peace". Irene, and related names, may refer to: * Irene (given name) Places * Irene, Gauteng, South Africa * Irene, South Dakota, United States * Irene, Texas, United States ...
(r. 797–802) and Emperor Nikephoros I (r. 802–811). During the second Iconoclasm, which began in 814, his family suffered persecution since his father, Sergios, was a prominent iconophile. Sergios's family returned to favor only after the restoration of the icons in 842. Certain scholars assert that Photios was, at least in part, of Armenian descent while other scholars merely refer to him as a " Greek Byzantine". Byzantine writers also report that Emperor Michael III (r. 842–867) once angrily called Photios " Khazar-faced", but whether this was a generic insult or a reference to his ethnicity is unclear. Although Photios had an excellent education, we have no information about how he received this education. The famous library he possessed attests to his enormous erudition (theology, history, grammar, philosophy, law, the natural sciences, and medicine).. Most scholars believe that he never taught at Magnaura or at any other university; Vasileios N. Tatakes asserts that, even while he was patriarch, Photios taught "young students passionately eager for knowledge" at his home, which "was a center of learning". He was a friend of the renowned Byzantine scholar and teacher Leo the Mathematician. Photios says that, when he was young, he had an inclination for the monastic life, but instead he started a secular career. The way to public life was probably opened for him by (according to one account) the marriage of his brother Sergios to Irene, a sister of Empress Theodora, who upon the death of her husband Emperor Theophilos (r. 829–842) in 842, had assumed the regency of the Byzantine Empire. Photios became a captain of the guard ('' prōtospatharios'') and subsequently chief imperial secretary ('' protasēkrētis''). At an uncertain date, Photios participated in an embassy to the Abbasids of
Baghdad Baghdad (; ar, بَغْدَاد , ) is the capital of Iraq and the second-largest city in the Arab world after Cairo. It is located on the Tigris near the ruins of the ancient city of Babylon and the Sassanid Persian capital of Ctesipho ...
. Photios achieved a dazzling reputation as a scholar. In a feud with Patriarch Ignatios, Photios invented a fanciful theory that people have two souls, for the sole purpose of tricking Ignatios into embarrassing himself by being seen to take it seriously, whereupon Photius withdrew his proposal and admitted he had not been serious. The historian John Julius Norwich described this as "perhaps the only really satisfactory practical joke in the whole history of theology."


Patriarch of Constantinople

Photios's ecclesiastical career took off spectacularly after '' Caesar'' Bardas and his nephew, the youthful Emperor Michael, put an end to the administration of the regent Theodora and the
logothete of the drome The ( gr, λογοθέτης τοῦ δρόμου), in English usually rendered as Logothete of the Course/Drome/ or Postal Logothete, was the head of the department of the Public Post ( la, cursus publicus, gr, δημόσιος δρόμος, de ...
Theoktistos in 856. In 858, Bardas found himself opposed by the then Patriarch Ignatios, who refused to admit him into Hagia Sophia, since it was believed that he was having an affair with his widowed daughter-in-law. In response, Bardas and Michael engineered Ignatios's confinement and removal on the charge of treason, thus leaving the patriarchal throne empty. The throne was soon filled with a kinsman of Bardas, Photios himself, who was tonsured a monk on December 20, 858, and on the four following days was successively ordained lector, sub-deacon, deacon and priest, and then on Christmas Day, the patronal feast of Constantinople's cathedral, Hagia Sophia, Photios's was consecrated a bishop and installed as patriarch. The confinement and removal of Ignatios and the speedy promotion of Photios at first caused only internal controversy within the Church of Constantinople, and in 859 a local council was held, examining the issue and confirming the removal of Ignatios and election of Photios. In the same time, partisans of Ignatios decided to appeal to the Church of Rome, thus initiating ecclesiastical controversy on an ecumenical scale as 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 ...
and the rest of the western bishops took up the cause of Ignatios. The latter's confinement and removal without a formal ecclesiastical trial meant that Photios's election was uncanonical, and eventually Pope Nicholas I sought to involve himself in determining the legitimacy of the succession. His legates were dispatched to Constantinople with instructions to investigate, but finding Photios well ensconced, they acquiesced in the confirmation of his election at a synod in 861. On their return to Rome, they discovered that this was not at all what Nicholas had intended, and in 863 at a synod in Rome the pope deposed Photios, and reappointed Ignatius as the rightful patriarch, triggering a schism. Four years later, Photios was to respond on his own part by calling a Council and excommunicating the pope on grounds of heresy – over the question of the double procession of the
Holy Spirit In Judaism, the Holy Spirit is the divine force, quality, and influence of God over the Universe or over his creatures. In Nicene Christianity, the Holy Spirit or Holy Ghost is the third person of the Trinity. In Islam, the Holy Spirit acts ...
. The situation was additionally complicated by the question of papal authority over the entire Church and by disputed jurisdiction over newly converted
Bulgaria Bulgaria (; bg, България, Bǎlgariya), officially the Republic of Bulgaria,, ) is a country in Southeast Europe. It is situated on the eastern flank of the Balkans, and is bordered by Romania to the north, Serbia and North Mac ...
. This state of affairs changed with the murder of Photios's patron Bardas in 866 and of Emperor Michael III in 867, by his colleague Basil the Macedonian, who now usurped the throne. Photios was deposed as patriarch, not so much because he was a protégé of Bardas and Michael, but because Basil I was seeking an alliance with the Pope and the western emperor. Photios was removed from his office and banished about the end of September 867, and Ignatios was reinstated on November 23. Photios was condemned by the Council of 869–870, thus putting an end to the schism. During his second patriarchate, however, Ignatios followed a policy not very different from that of Photios. Not long after his condemnation, Photios had reingratiated himself with Basil, and became tutor to the Byzantine emperor's children. From surviving letters of Photios written during his exile at the Skepi monastery, it appears that the ex-patriarch brought pressure to bear on the Byzantine emperor to restore him. Ignatios's biographer argues that Photios forged a document relating to the genealogy and rule of Basil's family, and had it placed in the imperial library where a friend of his was a librarian. According to this document, the Byzantine emperor's ancestors were not mere peasants as everyone believed but descendants of the Arsacid Dynasty of Armenia. True or not, this story does reveal Basil's dependence on Photios for literary and ideological matters. Following Photios's recall, Ignatios and the ex-patriarch met, and publicly expressed their reconciliation. When Ignatios died on October 23, 877, it was a matter of course that his old opponent replaced him on the patriarchal throne three days later. Shaun Tougher asserts that from this point on Basil no longer simply depended on Photios, but in fact he was dominated by him. Photios now obtained the formal recognition of the Christian world in a council convened at Constantinople in November 879. The legates of Pope John VIII attended, prepared to acknowledge Photios as legitimate patriarch, a concession for which the pope was much censured by Latin opinion. The patriarch stood firm on the main points contested between the Eastern and Western Churches: the demand of an apology to the Pope, the ecclesiastical jurisdiction over
Bulgaria Bulgaria (; bg, България, Bǎlgariya), officially the Republic of Bulgaria,, ) is a country in Southeast Europe. It is situated on the eastern flank of the Balkans, and is bordered by Romania to the north, Serbia and North Mac ...
, and the addition of the '' filioque'' to the Nicene creed by the Western church. Eventually, Photios refused to apologize or accept the ''filioque'', and the papal legates made do with his return of Bulgaria to Rome. This concession, however, was purely nominal, as Bulgaria's return to the
Byzantine rite The Byzantine Rite, also known as the Greek Rite or the Rite of Constantinople, identifies the wide range of cultural, liturgical, and canonical practices that developed in the Eastern Christian Church of Constantinople. The canonical hours ar ...
in 870 had already secured for it an autocephalous church. Without the consent of Boris I of Bulgaria (r. 852–889), the papacy was unable to enforce its claims. Photios also promoted a policy of religious reconciliation with the Armenian kingdom to the east of the empire. He sought to bridge the confessional differences between the Greek Orthodox and Armenian churches on two separate occasions, once in 862 and again in 877, but his efforts ultimately proved unsuccessful. During the altercations between Emperor Basil I and his heir Leo VI, Photios took the side of the Byzantine emperor. In 883, Basil accused Leo of conspiracy and confined the prince to the palace; he would have even have Leo blinded had he not been dissuaded by Photios and Stylianos Zaoutzes, the father of Zoe Zaoutzaina, Leo's mistress. In 886, Basil discovered and punished a conspiracy by the domestic of the '' Hikanatoi''
John Kourkouas the Elder John Kourkouas ( gr, Ἰωάννης Κουρκούας, Ioannes Kourkouas) was a senior Byzantine military commander who led a conspiracy against Emperor Basil I the Macedonian. John Kourkouas (or Κροκόας, Krokoas in Symeon the Logothete, ...
and many other officials. In this conspiracy, Leo was not implicated, but Photios was possibly one of the conspirators against Basil's authority. Basil died in 886 injured while hunting, according to the official story. Warren T. Treadgold believes that this time the evidence points to a plot on behalf of Leo VI, who became emperor, and deposed Photios, although the latter had been his tutor. Photios was replaced by the Byzantine emperor's brother Stephen, and sent into exile to the monastery of Bordi in
Armenia Armenia (), , group=pron officially the Republic of Armenia,, is a landlocked country in the Armenian Highlands of Western Asia.The UNbr>classification of world regions places Armenia in Western Asia; the CIA World Factbook , , and ...
. It is confirmed from letters to and from Pope Stephen that Leo extracted a resignation from Photios. In 887, Photios and his protégé,
Theodore Santabarenos Photios I ( el, Φώτιος, ''Phōtios''; c. 810/820 – 6 February 893), also spelled PhotiusFr. Justin Taylor, essay "Canon Law in the Age of the Fathers" (published in Jordan Hite, T.O.R., & Daniel J. Ward, O.S.B., "Readings, Cases, Materia ...
, were put on trial for treason before a tribunal headed by senior officials, headed by
Andrew the Scythian Andrew the Scythian (Greek: Άνδρέας, died after 887) was a senior Byzantine military officer who distinguished himself in the Arab–Byzantine wars. He eventually held the post of Domestic of the Schools during the last years of the reign o ...
. Although the sources sympathetic to Photios give the impression that the trial ended without a conviction, the chronicle of Pseudo-Symeon clearly states that Photios was banished to the monastery of Gordon, where he later died. Latin sources confirm that while he did not die in a state of complete excommunication, having been reinstated by a council which was approved by Pope John VIII, his ecclesiastical career was viewed in utter disgrace by Catholic authorities and many of his theological opinions were condemned posthumously. Yet it appears that he did not remain reviled for the remainder of his life. Photios continued his career as a writer throughout his exile, and Leo probably rehabilitated his reputation within the next few years; in his ''Epitaphios'' on his brothers, a text probably written in 888, the Emperor presents Photios favorably, portraying him as the legitimate archbishop, and the instrument of ultimate unity, an image that jars with his attitude to the patriarch in the previous year. Confirmation that Photios was rehabilitated comes upon his death: according to some chronicles, his body was permitted to be buried in Constantinople. In addition, according to the anti-Photian biographer of Ignatius, partisans of the ex-patriarch after his death endeavored to claim for him the "honor of sainthood". Furthermore, a leading member of Leo's court, Leo Choirosphaktes, wrote poems commemorating the memory of several prominent contemporary figures, such as Leo the Mathematician and the Patriarch Stephen, and he also wrote one on Photios. Shaun Tougher notes, however, that "yet Photios's passing does seem rather muted for a great figure of Byzantine history ..Leo ..certainly did not allow him back into the sphere of politics, and it is surely his absence from this arena that accounts for his quiet passing." The Eastern Orthodox Church venerates Photios as a saint, his feast day being February 6, as well as Ignatius, whose feast day is on October 23. Ignatius is also venerated as a saint in the Catholic Church.


Assessments

Photios is one of the most famous figures not only of 9th-century Byzantium but of the entire history of the Byzantine Empire. One of the most learned men of his age, and revered – even by some of his opponents and detractors – as the most prolific theologian of his time, he has earned his fame due to his part in ecclesiastical conflicts, and also for his intellect and literary works. Analyzing his intellectual work, Tatakes regards Photios as "mind turned more to practice than to theory". He believes that, thanks to Photios, humanism was added to Orthodoxy as a basic element of the national consciousness of the medieval Byzantines, returning it to the place it had had in the late Roman (early Byzantine) period. Tatakes also argues that, having understood this national consciousness, Photios emerged as a defender of the Greek nation and its spiritual independence in his debates with the Western Church.. Adrian Fortescue regards him as "one of the most wonderful men of all the middle ages", and stresses that "had enot given his name to the great schism, he would always be remembered as the greatest scholar of his time". Yet, Fortescue is equally adamant of his condemnation of Photios' involvement in the Schism: "And yet the other side of his character is no less evident. His insatiable ambition, his determination to obtain and keep the patriarchal see, led him to the extreme of dishonesty. His claim was worthless. That Ignatius was the rightful patriarch as long as he lived, and Photius an intruder, cannot be denied by any one who does not conceive the Church as merely the slave of a civil government. And to keep this place Photius descended to the lowest depth of deceit."


Writings


''Bibliotheca''

The most important of the works of Photios is his '' Bibliotheca'' or ''Myriobiblon'', a collection of extracts and abridgements of 280 volumes of classical authors (usually cited as Codices), the originals of which are now to a great extent lost. The work is especially rich in extracts from historical writers. To Photios, we are indebted for almost all we possess of Ctesias, Memnon of Heraclea, Conon, the lost books of
Diodorus Siculus Diodorus Siculus, or Diodorus of Sicily ( grc-gre, Διόδωρος ;  1st century BC), was an ancient Greek historian. He is known for writing the monumental universal history '' Bibliotheca historica'', in forty books, fifteen of which ...
, and the lost writings of
Arrian Arrian of Nicomedia (; Greek: ''Arrianos''; la, Lucius Flavius Arrianus; ) was a Greek historian, public servant, military commander and philosopher of the Roman period. '' The Anabasis of Alexander'' by Arrian is considered the best ...
. Theology and ecclesiastical history are also very fully represented, but poetry and ancient philosophy are almost entirely ignored. It seems that he did not think it necessary to deal with those authors with whom every well-educated man would naturally be familiar. The literary criticisms, generally distinguished by keen and independent judgment, and the excerpts vary considerably in length. The numerous biographical notes are probably taken from the work of Hesychius of Miletus. Some older scholarship speculated that the ''Bibliotheca'' was compiled in
Baghdad Baghdad (; ar, بَغْدَاد , ) is the capital of Iraq and the second-largest city in the Arab world after Cairo. It is located on the Tigris near the ruins of the ancient city of Babylon and the Sassanid Persian capital of Ctesipho ...
at the time of Photius's embassy to the
Abbasid The Abbasid Caliphate ( or ; ar, الْخِلَافَةُ الْعَبَّاسِيَّة, ') was the third caliphate to succeed the Islamic prophet Muhammad. It was founded by a dynasty descended from Muhammad's uncle, Abbas ibn Abdul-Muttal ...
court, since many of the mentioned works were rarely cited during the so-called Byzantine Dark Ages c. 630 – c. 800, and it was known that the Abbasids were interested in works of Greek science and philosophy. However, specialists of this period of Byzantine history, such as Paul Lemerle, have shown that Photios could not have compiled his ''Bibliotheca'' in Baghdad because he clearly states in both his introduction and his postscript that when he learned of his appointment to the embassy, he sent his brother a summary of books that he read ''previously'', "since the time I learned how to understand and evaluate literature" i.e. since his youth. Moreover, the Abbasids were interested only in Greek science, philosophy and medicine; they did not have Greek history, rhetoric, or other literary works translated; nor did they have Christian patristic writers translated. Yet the majority of works in ''Bibliotheca'' are by Christian patristic authors, and most of the secular texts in ''Bibliotheca'' are histories, grammars or literary works, usually rhetoric, rather than science, medicine or philosophy. This further indicates that the majority of the works cannot have been read while Photios was in the Abbasid empire.


Other works

The ''Lexicon'' (Λέξεων Συναγωγή), published later than the ''Bibliotheca'', was probably in the main the work of some of his pupils. It was intended as a book of reference to facilitate the reading of old classical and sacred authors, whose language and vocabulary were out of date. For a long time, the only manuscripts of the ''Lexicon'' were the ''Codex Galeanus'', which passed into the library of
Trinity College, Cambridge Trinity College is a constituent college of the University of Cambridge. Founded in 1546 by King Henry VIII, Trinity is one of the largest Cambridge colleges, with the largest financial endowment of any college at either Cambridge or Oxford. ...
and Berolinensis graec. oct. 22, both of which were incomplete. But in 1959, Linos Politis of the University of Thessaloniki discovered a complete manuscript, codex Zavordensis 95, in the Zavorda Monastery (Greek: Ζάβορδα) in Grevena, Greece, where it still resides. His most important theological work is the ''Amphilochia'', a collection of some 300 questions and answers on difficult points in Scripture, addressed to Amphilochius, archbishop of Cyzicus. Other similar works are his treatise in four books against the Manichaeans and Paulicians, and his controversy with the Latins on the Procession of the
Holy Spirit In Judaism, the Holy Spirit is the divine force, quality, and influence of God over the Universe or over his creatures. In Nicene Christianity, the Holy Spirit or Holy Ghost is the third person of the Trinity. In Islam, the Holy Spirit acts ...
. Photios also addressed a long letter of theological advice to the newly converted Boris I of Bulgaria. Numerous other ''Epistles'' also survive. Photios is also the writer of two "mirrors of princes", addressed to Boris-Michael of Bulgaria (Epistula 1, ed. Terzaghi) and to Leo VI the Wise (Admonitory Chapters of Basil I). Photios' epitome of Philostorgius' ''Church History'' is the principle source for the work, which is now lost. The first English translation, by Holy Transfiguration Monastery, of the "
Mystagogy of the Holy Spirit A mystagogue (from el, μυσταγωγός, mystagogos, "person who initiates into mysteries") is a person who initiates others into mystic beliefs, and an educator or person who has knowledge of the sacred mysteries of a belief system. Another ...
" by Photios was published in 1983. Another translation was published in 1987 with a preface by
Archimandrite The title archimandrite ( gr, ἀρχιμανδρίτης, archimandritēs), used in Eastern Christianity, originally referred to a superior abbot ('' hegumenos'', gr, ἡγούμενος, present participle of the verb meaning "to lead") wh ...
(now Archbishop) Chrysostomos of Etna.


See also

* Byzantine philosophy * Filioque clause * University of Magnaura * Bibliotheca (Photius) *
Bibliotheca (Pseudo-Apollodorus) The ''Bibliotheca'' (Ancient Greek: grc, Βιβλιοθήκη, lit=Library, translit=Bibliothēkē, label=none), also known as the ''Bibliotheca'' of Pseudo-Apollodorus, is a compendium of Greek mythology, Greek myths and Greek hero, heroic lege ...


Notes


References


Citations


Primary sources

Recent years have seen the first translations into English of a number of primary sources about Photios and his times. * Featherstone, Jeffrey Michael and Signes-Codoñer, Juan (tranlators). ''Chronographiae quae Theophanis Continuati nomine fertur Libri I-IV'' (Chronicle of Theophanes Continuatus Books I-IV, comprising the reigns of Leo V the Armenian to Michael III), Berlin, Boston: De Gruyter, 2015. * Kaldellis, A. (trans.). ''On the reigns of the emperors'' (the history of Joseph Genesios), Canberra: Australian Association for Byzantine Studies; Byzantina Australiensia 11, 1998. * Ševčenko, Ihor (trans.). ''Chronographiae quae Theophanis Continuati nomine fertur Liber quo Vita Basilii Imperatoris amplectitur'' (Chronicle of Theophanes Continuatus comprising the Life of Basil I), Berlin: De Gruyter, 2011. * Wahlgren, Staffan (translator, writer of introduction and commentary). ''The Chronicle of the Logothete'', Liverpool University Press; Translated Texts for Byzantinists, vol. 7, 2019. * Wortley, John (trans.). ''A synopsis of Byzantine history, 811-1057'' (the history of John Scylitzes, active 1081), Cambridge University Press, 2010.


Secondary sources

* * * * * * * * * * * * * * * * * * * * * * *Taylor, Fr. Justin (1990), essay "Canon Law in the Age of the Fathers" (published in "Readings, Cases, Materials in Canon Law: A Textbook for Ministerial Students, Revised Edition" ollegeville, MN: The Liturgical Pressby Jordan Hite, T.O.R., & Daniel J. Ward, O.S.B.) * * * * *


External links


Saint Photios the Great
Orthodox Icon and Synaxarion (February 6)
Patriarch Photios of Constantinople
Life and translations of his works

Photios's summary of Books 9–16 of Memnon of Heraclea's history of Heraclea Pontica

* ttp://www.myriobiblos.gr/texts/english/photios_mystagogy.html Saint Photius the Great, ''Mystagogy of the Holy Spirit''(English translation)
Ongoing English Translation of the Lexicon
*''Photii biblioteca ex recensione Immanuelis Bekkeri'', Berolini typis et impensis Ge. Reimeri, 1824–25
vol. 1vol. 2
* {{DEFAULTSORT:Photios 01 Of Constantinople 9th-century deaths 9th-century births 9th-century Byzantine writers Anthologists Christian anti-Gnosticism Byzantine philosophers Byzantine theologians Byzantine writers Byzantine saints of the Eastern Orthodox Church Critics of the Catholic Church Greek religious writers People excommunicated by the Catholic Church 9th-century patriarchs of Constantinople 9th-century Christian saints Byzantine letter writers Filioque 9th-century Christian theologians Byzantine jurists 9th-century jurists Protospatharioi 9th-century Greek philosophers 9th-century Greek writers 9th-century Greek scientists 9th-century Greek mathematicians