Isaac or Sahak of Armenia ( – ) was the
catholicos
A catholicos (plural: catholicoi) is the head of certain churches in some Eastern Christian traditions. The title implies autocephaly and, in some cases, it is the title of the head of an autonomous church. The word comes from ancient Greek ( ...
(or patriarch) of the
Armenian Church from until . He is sometimes known as ''Isaac the Great'' or ''Sahak the Parthian'' () in reference to his father's
Parthian origin. He was the last Armenian patriarch who was directly descended from
Gregory the Illuminator
Gregory the Illuminator ( – ) was the founder and first official Catholicos of All Armenians, head of the Armenian Apostolic Church. He Christianization of Armenia, converted Armenia from Zoroastrianism in Armenia, Zoroastrianism to Chris ...
, who converted the Kingdom of Armenia to Christianity in the early fourth century and became the first head of the Armenian Church. He supported
Mesrop Mashtots
Mesrop Mashtots (; , ' 362February 17, 440 AD) was an Armenians, Armenian Linguistics, linguist, composer, Christian theology, theologian, Politician, statesman, and Hymnology, hymnologist. He is venerated as a saint in the Armenian Apostolic C ...
in the creation of the
Armenian alphabet
The Armenian alphabet (, or , ) or, more broadly, the Armenian script, is an alphabetic writing system developed for Armenian and occasionally used to write other languages. It is one of the three historical alphabets of the South Caucasu ...
and personally participated in the translation of the Bible into Armenian.
Early life
Isaac was born to the future Catholicos
Nerses I (). Through his father he was a descendant of
Gregory the Illuminator
Gregory the Illuminator ( – ) was the founder and first official Catholicos of All Armenians, head of the Armenian Apostolic Church. He Christianization of Armenia, converted Armenia from Zoroastrianism in Armenia, Zoroastrianism to Chris ...
, who
converted the Kingdom of Armenia to Christianity in the early fourth century and became the first head of the
Armenian Church. Since that time, the
descendants of Gregory had held the office of catholicos of Armenia hereditarily, with some interruptions. According to the anonymous ''Vita'' of St. Nerses, Isaac's mother was a
Mamikonian
Mamikonian or Mamikonean () was an Armenian aristocratic dynasty which dominated Armenia between the 4th and 8th centuries—through the late antique kingdom, Sasanian, Byzantine, and Arab dominations. They were the most notable noble house in ...
princess called Sandukht, whom Nerses married in
Caesarea
Caesarea, a city name derived from the Roman title " Caesar", was the name of numerous cities and locations in the Roman Empire:
Places
In the Levant
* Caesarea Maritima, also known as "Caesarea Palaestinae", an ancient Roman city near the modern ...
prior to his consecration as catholicos. The ''Vita'' claims that Sandukht died after giving birth to Isaac. Another source, the ''
Buzandaran Patmutʻiwnkʻ'', neither names Nerses's wife nor mentions his time in Caesarea, while
Movses Khorenatsi
Movses Khorenatsi ( 410–490s AD; , ) was a prominent Armenians, Armenian historian from late antiquity and the author of the ''History of Armenia (book), History of the Armenians''.
Movses's ''History of the Armenians'' was the first attempt at ...
writes that Nerses married the daughter of "the great noble Aspion" (who is not known from other sources) in Constantinople.
During his father's patriarchate, Isaac studied for many years in Caesarea, Alexandria, and Constantinople. He learned Greek, Syriac and Persian. The Armenian historian
Ghazar Parpetsi writes of him that he studied "among many learned Byzantines" and was "fully versed in musical notation, exhortatory rhetoric, and especially philosophy. He was later consecrated as a bishop and preached with his sixty students at
Etchmiadzin Cathedral
Etchmiadzin Cathedral is the Mother church#Church as a building, mother church of the Armenian Apostolic Church, located in the city Dual naming, dually known as Etchmiadzin (Ejmiatsin) and Vagharshapat, Armenia. It is #Oldest cathedral, usuall ...
. His father died in , purportedly poisoned by the Arsacid king of Armenia
Pap. At some point, Isaac had a daughter named Sahakanoysh, who later married Hamazasp Mamikonian. It is assumed that his wife died before he became catholicos.
Patriarchate
Election and first deposition
Isaac was elected catholicos after the death of his predecessor,
Aspuraces. He supported King
Khosrov IV of Armenia in his efforts to reunite the Armenian realm, which had been partitioned into Roman and Sasanian parts in 387. Khosrov was imprisoned by the Sasanian king in about 389, possibly because of his nomination of Sahak as catholicos without Persian approval. After Khosrov's imprisonment, Isaac was deposed as catholicos, but Khosrov's successor
Vramshapuh managed to have him restored to his position.
Through Isaac's efforts the churches and monasteries destroyed by the Persians were rebuilt, education was cared for in a generous way, Zoroastrianism which
Shah
Shāh (; ) is a royal title meaning "king" in the Persian language.Yarshater, Ehsa, ''Iranian Studies'', vol. XXII, no. 1 (1989) Though chiefly associated with the monarchs of Iran, it was also used to refer to the leaders of numerous Per ...
Yazdegerd I
Yazdegerd I (also spelled Yazdgerd and Yazdgird; ) was the Sasanian King of Kings () of Iran from 399 to 420. A son of Shapur III (), he succeeded his brother Bahram IV () after the latter's assassination.
Yazdegerd I's largely-uneventful reig ...
tried to set up was cast out, and three councils held to re-establish ecclesiastical discipline. The catholicos was noted for his ascetic lifestyle.
Creation of the Armenian alphabet

Prior to the invention of the Armenian alphabet, the languages of the Armenian Church were Greek and Syriac. Armenia had been divided into Roman and Sasanian client kingdoms in 387. In the Roman part, however, the Armenians were forbidden the use of the Syriac language and used Greek instead, and the country gradually Hellenized; in the Persian part, on the other hand, Greek was absolutely prohibited, while Syriac was used. In this way the ancient culture of the Armenians was in danger of disappearing and national unity was seriously compromised.
Isaac encouraged
Mesrop Mashtots
Mesrop Mashtots (; , ' 362February 17, 440 AD) was an Armenians, Armenian Linguistics, linguist, composer, Christian theology, theologian, Politician, statesman, and Hymnology, hymnologist. He is venerated as a saint in the Armenian Apostolic C ...
to invent the
Armenian alphabet
The Armenian alphabet (, or , ) or, more broadly, the Armenian script, is an alphabetic writing system developed for Armenian and occasionally used to write other languages. It is one of the three historical alphabets of the South Caucasu ...
and himself translated and revised parts of the Bible. According to Ghazar Parpetsi, Mashtots and the first translators frequently turned to Isaac, who had received a solid education, for assistance while making the alphabet. Their translation from the Syriac
Peshitta
The Peshitta ( ''or'' ') is the standard Syriac edition of the Bible for Syriac Christian churches and traditions that follow the liturgies of the Syriac Rites.
The Peshitta is originally and traditionally written in the Classical Syriac d ...
was revised by means of the
Septuagint
The Septuagint ( ), sometimes referred to as the Greek Old Testament or The Translation of the Seventy (), and abbreviated as LXX, is the earliest extant Greek translation of the Hebrew Bible from the original Biblical Hebrew. The full Greek ...
, and even, it seems, from the
Hebrew
Hebrew (; ''ʿÎbrit'') is a Northwest Semitic languages, Northwest Semitic language within the Afroasiatic languages, Afroasiatic language family. A regional dialect of the Canaanite languages, it was natively spoken by the Israelites and ...
text (between 410 and 430).
[Isavertenc̣, Yakobos. "Armenia and the Armenians"](_blank)
Volume 2, Venice. Armenian Monastery of St. Lazaro, 1875, p. 61 et seq. The liturgy also, hitherto Syrian, was translated into Armenian, drawing at the same time on the liturgy of Saint
Basil of Caesarea
Basil of Caesarea, also called Saint Basil the Great (330 – 1 or 2 January 379) was an early Roman Christian prelate who served as Bishop of Caesarea in Cappadocia from 370 until his death in 379. He was an influential theologian who suppor ...
, so as to obtain for the new service a national color. Isaac had already established schools for higher education with the aid of disciples whom he had sent to study at
Edessa
Edessa (; ) was an ancient city (''polis'') in Upper Mesopotamia, in what is now Urfa or Şanlıurfa, Turkey. It was founded during the Hellenistic period by Macedonian general and self proclaimed king Seleucus I Nicator (), founder of the Sel ...
,
Melitene, Constantinople, and elsewhere. Through them he now had the principal masterpieces of Greek and Syrian Christian literature translated, e.g., the writings of
Athanasius of Alexandria
Athanasius I of Alexandria ( – 2 May 373), also called Athanasius the Great, Athanasius the Confessor, or, among Coptic Christians, Athanasius the Apostolic, was a Christian theologian and the 20th patriarch of Alexandria (as Athanasius ...
,
Cyril of Jerusalem
Cyril of Jerusalem (, ''Kýrillos A Ierosolýmon''; ; 386) was a theologian of the Early Church. About the end of AD 350, he succeeded Maximus as Bishop of Jerusalem, but was exiled on more than one occasion due to the enmity of Acacius of ...
,
Basil
Basil (, ; , ; ''Ocimum basilicum'' (, )), also called great basil, is a culinary herb of the family Lamiaceae (mints). It is a hardiness (plants), tender plant, and is used in cuisines worldwide. In Western cuisine, the generic term "basil" r ...
,
Gregory of Nazianzus
Gregory of Nazianzus (; ''Liturgy of the Hours'' Volume I, Proper of Saints, 2 January. – 25 January 390), also known as Gregory the Theologian or Gregory Nazianzen, was an early Roman Christian theologian and prelate who served as Archbi ...
,
Gregory of Nyssa
Gregory of Nyssa, also known as Gregory Nyssen ( or Γρηγόριος Νυσσηνός; c. 335 – c. 394), was an early Roman Christian prelate who served as Bishop of Nyssa from 372 to 376 and from 378 until his death in 394. He is ve ...
,
John Chrysostom
John Chrysostom (; ; – 14 September 407) was an important Church Father who served as archbishop of Constantinople. He is known for his preaching and public speaking, his denunciation of abuse of authority by both ecclesiastical and p ...
,
Ephrem the Syrian
Ephrem the Syrian (; ), also known as Ephraem the Deacon, Ephrem of Edessa or Aprem of Nisibis, (Syriac: ܡܪܝ ܐܦܪܝܡ ܣܘܪܝܝܐ — ''Mâr Aphrêm Sûryâyâ)'' was a prominent Christian theology, Christian theologian and Christian literat ...
, and others. The invention of the Armenian alphabet sped up the process of the Christianization of the Armenian population.
Second deposition and death
In 428, the last Arsacid king of Armenia
Artashir was deposed by the Sasanian king with the help of most of the Armenian nobles. Isaac was against this and was himself removed from his position as Catholicos. An Armenian named Surmak was appointed in his place but was soon replaced by the Syrian bishop Brkisho. Isaac was imprisoned in Ctesiphon until 432, when he was allowed to return to Armenia and occupy certain offices within the church. Isaac refused to retake the patriarchate after the death of Catholicos Samuel, Brkisho's Syrian successor, in 437.
Isaac died around 438 in the village of Blur in
Bagrevand. His body was taken to
Taron and buried in
Ashtishat. Since Isaac was the last male of the Gregorid line, his house's territories of Taron, Bagrevand and
Acilisene passed to the Mamikonians through Isaac's daughter Sahakanoysh, who was married to the Mamikonian prince Hamazasp.
Works
According to Abraham Terian, the identifiable works attributed to Isaac consist of
canons and his two letters to Archbishop
Proclus of Constantinople and Bishop
Acacius of Melitene. The letter to Proclus is co-authored with Mashtots and concerns confessional matters. It is a reply to a letter sent by Proclus (''Epistola II: Ad Armenios, de fide'') to the Armenian clergy, which has been preserved in Greek and Armenian translation. The letter to Acacius is also a reply; Acacius's letter to Isaac, and another addressed to the Armenians, have been preserved in Armenian. Some authors have doubted the authenticity of the canons attributed to Isaac, although, according to Terian, these doubts are unjustified.
Movses Khorenatsi's history quotes letters from Sahak to Eastern Roman emperor
Theodosius II
Theodosius II ( ; 10 April 401 – 28 July 450), called "the Calligraphy, Calligrapher", was Roman emperor from 402 to 450. He was proclaimed ''Augustus (title), Augustus'' as an infant and ruled as the Eastern Empire's sole emperor after the ...
, the consul
Anatolius, and
Archbishop Atticus of Constantinople. Isaac is said to have been the author of liturgical hymns. Four sermons in the Armenian
book of hours
A book is a structured presentation of recorded information, primarily verbal and graphical, through a medium. Originally physical, electronic books and audiobooks are now existent. Physical books are objects that contain printed material, ...
(''zhamagirk'') and many hymns (''sharakans'') are attributed to him.
Veneration
Isaac is venerated as a saint in the Armenian Apostolic and Roman Catholic churches. In the Armenian Apostolic Church, his memorial day is marked twice a year: first, on the Saturday preceding the penultimate Sunday before Lent, thus falling between January 24 and February 28; second, together with Saint Mesrop Mashtots, on the Thursday following the fourth Sunday after
Pentecost
Pentecost (also called Whit Sunday, Whitsunday or Whitsun) is a Christianity, Christian holiday which takes place on the 49th day (50th day when inclusive counting is used) after Easter Day, Easter. It commemorates the descent of the Holy Spiri ...
, thus falling between June 1 and July 16.
Vision
The end of the first section of Ghazar Parpetsi's history contains a description of a vision supposedly seen by Sahak and narrated by him after he refused the request of the Armenian nobility to return to the patriarchal throne. In the vision, Sahak saw various symbols connected with the Church and faith and saw that the Arsacids of Armenia and Gregorids would fall from power and apparently disappear; however, after a period of chaos both would be restored to their respective thrones; his daughter Sahakanoysh would give birth to "powerful and pious men." The passage about Sahak's vision is thought by some scholars to be a later interpolation into Ghazar's sixth-century history, although Gohar Muradyan considers it possible that Ghazar himself wrote it, perhaps drawing from an existing source. Sahak's vision was repeated in many Armenian works and was translated into Greek and thence into Georgian. Some connected it with events in their own time, even as late as the end of the seventeenth century.
Notes
References
Citations
Bibliography
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{{Authority control
Armenian saints
Catholicoi of Armenia
4th-century Armenian bishops
5th-century Armenian bishops
338 births
439 deaths
Doctors of the Church
5th-century Christian saints
5th-century Iranian people
4th-century Iranian people
5th-century Armenian people
4th-century Armenian people
4th-century translators
5th-century writers
Christians in the Sasanian Empire
Gregorids