Osroene#Roman province

{{History of the Arab States}}

File:Map of Roman dependency of Sophene, Corduene, Commagene, and Osrhoene as of 31 BC.png

File:Asia Minor in the early 1st century AD - general map - provinces, client states and main settlements - bleached - English legend.jpg in the early 1st century AD with Osroëne as a client state of the Parthian Empire]]

File:Roman_East_50-en.svg

{{See also|Abgarid dynasty}}

Osroene, or Edessa, was one of several states that acquired independence from the collapsing Seleucid Empire through a dynasty of the nomadic Nabataean Arab tribe from Southern Canaan and North Arabia, the Osrhoeni, from 136 BC. Osroene's name either derives from the name of this tribe, or from Orhay (Urhay), the original Aramaic name of Edessa.{{sfn|Mango|1991}} Arab influence had been strong in the region.{{sfn|Lieu|1997|p=174-175}}

Osroene endured for four centuries, with twenty-eight rulers occasionally named "king" on their coins. Most of the kings of Osroene were called Abgar or Manu and settled in urban centers.{{cite book|last=Fortescue|first=Adrian|author-link=Adrian Fortescue|title=The uniate Eastern churches: the Byzantine rite in Italy, Sicily, Syria and Egypt|url=https://books.google.com/books?id=9_atAQAACAAJ|year=1923|publisher=Burns, Oates & Washbourne, ltd.|page=22}}

Osroene was generally allied with the Parthian Empire.{{sfn|Segal|1982|p=210–213}}{{sfn|Lieu|1997|p=174-175}} After a period under the rule of the Parthian Empire, it was absorbed into the Roman Empire in 114 as a semiautonomous vassal state, and incorporated as a simple Roman province in 214.

Edessa was celebrated as the first kingdom to adopt Christianity as its official religion. There were two main Christianizing movements at Edessa, one that came from Nisibis in the east in the first century and the second that came from Antioch in the west in the end of the second century. There is a mention of a Christian synod in Osroene in 197 CE but scholars have doubted its authenticity. At the end of the second century a bishop of Edessa was consecrated in Rome but had to go to Antioch to be confirmed. The connection between Antioch and Edessa became close by the end of the second century and the see of Edessa became subject to Antioch in the early third century.{{Cite book |last=Segal |first=J. B. |title=Middle East studies and libraries: a felicitation volume for Prof. J.D. Pearson |date=1980 |publisher=Mansell |isbn=978-0-7201-1512-3 |editor-last=Bloomfield |editor-first=Barry Cambray |location=London |pages=179–191 |chapter=When did Christianity come to Edessa?}}

Edessa was regularly described as the 'capital of Mesopotamia' in early Syriac manuscripts. The earliest dated Christian literary manuscript in any language was written in November 411 CE, a fragment of Isaiah is dated 459-60 CE, a manuscript containing Genesis and Exodus is dated 463-4 CE, and the earliest dated Gospels in any language were completed in October 510 CE, although there are undated Gospel manuscripts which probably are from the fifth century.{{Cite book |last=Brock |first=Sebastian P. |title=The Bible in the Syriac tradition |date=2006 |publisher=Gorgias press |isbn=978-1-59333-300-3 |edition=2nd revised |series=Gorgias handbooks |location=Piscataway (N.J.) |pages=41}}{{Cite book |last=Brock |first=Sebastian Paul |title=Orientalia Christiana: Festschrift für Hubert Kaufhold zum 70. Geburtstag |date=2013 |publisher=Harrassowitz |isbn=978-3-447-06885-7 |editor-last=Bruns |editor-first=Peter |series=Eichstätter Beiträge zum christlichen Orient |location=Wiesbaden |pages=109–128 |chapter=Manuscripts copied in Edessa |editor-last2=Luthe |editor-first2=Heinz Otto}}{{Cite book |last1=Brock |first1=Sebastian P. |title=Catalogue of the Syriac manuscripts and fragments in the library of Deir Al-Surian, Wadi Al-Natrun (Egypt) |last2=Van Rompay |first2=Lucas |date=2014 |publisher=Uitgeverij Peeters |isbn=978-90-429-2962-3 |series=Orientalia Lovaniensia Analecta |location=Leuven Paris Walpole}}

There is an apocryphal legend, the Doctrine of Addai (late 4th or early 5th century), and an anonymous history, the Chronicle of Edessa (mid-6th century), claiming that Osroene was the first state to have accepted Christianity as state religion,{{Cite book |last=Shahîd |first=Irfan |title=Rome and the Arabs: a prolegomenon to the study of Byzantium and the Arabs/Irfan Shahîd |date=1984 |publisher=Dumberton Oaks research library and collection |isbn=978-0-88402-115-5 |location=Washington, D.C |pages=95–112}}{{cite book |last=Shahîd |first=Irfan |title=Pilgrimage and Holy Space in Late Antique Egypt |publisher=BRILL |year=1998 |isbn=90-04-11127-1 |editor-last=Frankfurter |editor-first=David |page=383 |chapter=Arab Christian Pilgrimages in the Proto-Byzantine Period (V-VII Centuries) |url=https://books.google.com/books?id=3yENB_dXAtwC}}{{blockquote|It was around 200 CE that Abgar IX adopted Christianity, thus enabling Edessa to become the first Christian state in history whose ruler was officially and openly a Christian.}} but some scholars believe there is not enough evidence to support that claim.{{iranica|abgar-dynasty-of-edessa-2nd-century-bc-to-3rd-century-ad}}{{blockquote|The fame of Edessa in history rests, however, mainly on its claim to have been the first kingdom to adopt Christianity as its official religion. According to the legend current for centuries throughout the civilized world, Abgar Ukkama wrote to Jesus, inviting him to visit him at Edessa to heal him from sickness. In return he received the blessing of Jesus and subsequently was converted by the evangelist Addai. There is, however, no factual evidence for Christianity at Edessa before the reign of Abgar the Great, 150 years later. Scholars are generally agreed that the legend has confused the two Abgars. It cannot be proved that Abgar the Great adopted Christianity; but his friend Bardaiṣan was a heterodox Christian, and there was a church at Edessa in 201. It is testimony to the personality of Abgar the Great that he is credited by tradition with a leading role in the evangelization of Edessa.}}{{cite book |last=Ball |first=Warwick |author-link=Warwick Ball |url=https://books.google.com/books?id=8Q2XxXx5ZdsC |title=Rome in the East: The Transformation of an Empire |publisher=Psychology Press |year=2000 |isbn=978-0-415-11376-2 |page=91-95}}{{blockquote|More significant than Bardaisan's conversion to Christianity was the conversion -reported by Bardaisan - of Abgar the Great himself." The conversion is controversial, but whether or not he became a Christian, Abgar had the wisdom to recognise the inherent order and stability in Christianity a century before Constantino did. Ho encouraged it as essential for maintaining Edessa's precarious balance between Rome and Iran. Thus, it is Abgar the Great who lays claim to being the world's first Christian monarch and Edessa the first Christian state. More than anything else, a major precedent had been set for the conversion of Rome itself. // The stories of the conversions of both Abgar V and Abgar VIII may not be true, and have been doubted by a number of Western authorities (with more than a hint at unwillingness to relinquish Rome's and St Peter's own primogeniture?). But whether true or not. the stories did establish Edessa as one of the more important centres for early Christendom."}}

By the end of the second century Christianity was well established in Edessa in various forms, some texts belong to the early third century and provide unambiguous evidence for Christianity at Edessa, such as the account of the flood at Edessa in 201 CE which is preserved in the Chronicle of Edessa, fragments of Bardaisan's works preserved by later writers and the Book of the Laws of the Countries written in the School of Bardaisan. By the end of the third century Christianity had spread to surrounding villages.{{Cite book |last=Brock |first=Sebastian |title=Eusebius, Christianity and Judaism |date=1992 |publisher=Wayne State Univ. Press |isbn=978-0-8143-2361-8 |editor-last=Attridge |editor-first=Harold W. |location=Detroit |pages=224–229 |chapter=Eusebius and Syriac Christianity |quote=}}

By c. AD 200, the Church in Edessa must have been of some size to judge from the expansion of Christianity in the early third century in Osroene and neighboring Adiabene, as according to the Chronicle of Arbela there were more than twenty bishoprics in the region bordering the Tigris in AD 224.{{Cite journal |last=Barnard |first=L. W. |date=1968 |title=The Origins and Emergence of the Church in Edessa during the First Two Centuries A.D. |journal=Vigiliae Christianae |volume=22 |issue=3 |pages=161–175 |doi=10.2307/1581930 |jstor=1581930 |issn=0042-6032 }} Edessa was known as a Christian city at a very early date, but the countryside was only Christianized during the 4-5th centuries by Syrian monks and ascetics.{{Cite book |last=Drijvers |first=Han J. W. |title=East of Antioch: studies in Early Syriac Christianity |date=1999 |publisher=Variorum |series=Collected studies series |location=Aldershot |page=36 |chapter=The Persistence of Pagan Cults and Practices in Christian Syria |isbn=978-0-86078-146-2}}

General opinion is that the official adoption of Christianity happened during the reign of Abgar VIII the Great (177 – 212), who was either Christian himself or not at all hostile to Christians, as the Christian writer Sextus Julius Africanus (c. 160 – c. 240) stayed at Abgar the Great's court in 195, and a Christian inscription was produced in Edessa, which is from the same period or few decades later than the Inscription of Abercius from 216.{{Cite book |last=Ramelli |first=Ilaria |title=Bardaisan of Edessa: a reassessment of the evidence and a new interpretation |date=2009 |publisher=Gorgias Press |location=Piscataway, NJ |pages=6, 34 |isbn=978-1-60724-074-7}} It is estimated that Christianity was preached in Edessa since 160 – 170,{{Cite book |last=Guscin |first=Mark |title=The tradition of the image of Edessa |date=2016 |publisher=Cambridge Scholars Publishing |location=Newcastle upon Tyne, UK |pages=9–10 |isbn=978-1-4438-8581-2 |oclc=935985663 }} and a flood in 201 destroyed "the temple of the church of the Christians", indicating a community large enough to have had a building of notable importance to the city at the time.{{Cite book |last=Ashbrook Harvey |first=Susan |title=The Cambridge history of Christianity |date=2006 |publisher=Cambridge University Press |isbn=978-0-521-81239-9 |editor-last=Mitchell |editor-first=Margaret M. |location=Cambridge |page=356 |chapter=Syria and Mesopotamia |editor-last2=Young |editor-first2=Frances Margaret}} The earliest known Syriac writer, Bardaisan (154-222), was active{{where |Presumably Edessa. Pls. specify! |date= April 2025}}, and contemporary coins dated 179-192 clearly show Abgar VIII the Great wearing a tiara with a cross.{{Cite book |title=The old Syriac inscriptions of Edessa and Osrhoene: texts, translations, and commentary |date=1999 |publisher=Brill |editor-last=Drijvers |editor-first=H. J. W. |series=Handbuch der Orientalistik. Erste Abteilung: der Nahe und der Mittlere Osten (Handbook of Oriental studies, Near and Middle East) |location=Leiden, Netherlands; Boston |pages=35–41 |language=en, syc |editor-last2=Healey |editor-first2=John F. |isbn=978-90-04-11284-1}}{{Cite book |last=Healey |first=John F. |title=Aramaic Inscriptions and Documents of the Roman Period: Aramaic Inscriptions and Documents of the Roman Period |date=2009 |publisher=OUP Oxford |series=Textbook of Syrian Semitic Inscriptions |location=Oxford |pages=13–15 |isbn=978-0-19-155484-1}} The dates and circumstances of the Christianization of the kings and the Kingdom of Osroene are still debated{{cite book|last=Brock|first=Sebastian|author-link=Sebastian Brock|contribution=The earliest Syriac literature|editor-last=Young|editor-first=Frances|editor-last2=Ayres|editor-first2=Lewis|editor-last3=Louth|editor-first3=Andrew|editor-last4=Casiday|editor-first4=Augustine|title=The Cambridge History of Early Christian Literature|page=162|isbn=978-0-521-46083-5|url=https://books.google.com/books?id=aepYpUVf9OkC&pg=PA162|date=2004|publisher=Cambridge University Press}}{{blockquote|Modern scholars have taken basically two very different approaches to this legend (which obviously reflects the general search for apostolic origins, characteristics of the fourth century). Some would dismiss it totally, while others prefer to see it as a retrojection into the first century of the conversion of the local king at the end of the second century. In other words, Abgar (V) the Black of the legend in fact represents Abgar (VIII) the Great (c. 177-212), contemporary of Badaisan. Attractive though this second approach might seem, there are serious objections to it, and the various small supportive evidence that Abgar (VIII) the Great became Christian disappears on closer examination.}}{{Cite journal |last=Ramelli |first=Ilaria L. E. |year=2006 |title=Possible Historical Traces in the Doctrina Addai |journal=Hugoye: Journal of Syriac Studies |volume=9 |issue=1 |pages=51–127 |url=https://www.researchgate.net/publication/368056437}}{{Cite journal |last=Ramelli |first=Ilaria L. E. |year=2013 |title=The Possible Origin of the Abgar-Addai Legend: Abgar the Black and Emperor Tiberius |journal=Hugoye: Journal of Syriac Studies |volume=16 |issue=2 |pages=325–341 |doi=10.31826/hug-2014-160112 |url=https://www.degruyterbrill.com/document/doi/10.31826/hug-2014-160112/html|url-access=subscription |doi-access=free }}{{Cite book |last1=López Calero |first1=Sergio |title=Strangers in the land: traveling texts, imagined others, and captured souls in Jewish, Christian, and Muslim traditions in late antique and mediaeval times |last2=Muñoz Gallarte |first2=Israel |date=2024 |publisher=Brill |isbn=978-90-04-69179-7 |editor-last=Hjälm |editor-first=Miriam L. |series=Studies on the Children of Abraham |location=Leiden Boston (Mass.) |pages=226–242 |chapter=A Christian Away from Home: The Greek Sources of Abgar's Legend Revisited |editor-last2=Zawanowska |editor-first2=Marzena}} and the claim of becoming the first Christian kingdom is contested by Armenia.{{Cite book |last=Atiya |first=Aziz Suryal |title=A history of eastern Christianity |date=1980 |publisher=Kraus Reprint |isbn=978-0-527-03703-1 |edition=Enl. and updated by the author with new preface, supplement to part I, supplementary bibliography |location=Millwood, N.Y |pages=305}}{{Cite book |last=Thomson |first=Robert W. |title=Die Christianisierung des Kaukasus: Referate des Internationalen Symposions, Wien, 9.-12. Dezember 1999 |date=2002 |publisher=Verlag der Österreichischen Akademie der Wissenschaften |editor-last=Seibt |editor-first=Werner |series=Denkschriften |location=Wien |pages=159–169 |chapter=Syrian Christianity and the conversion of Armenia |isbn=978-3-7001-3016-1}}{{Cite book |last=Ball |first=Warwick |title=Out of Arabia: Phoenicians, Arabs, and the discovery of Europe |date=2009 |publisher=East & West Publ. |edition=1. publ |series=Asia in Europe and the making of the West |location=London |page=95 |isbn=978-1-907318-00-9}}

In the Church of the Virgin in Dayr al-Suryān in Egypt, built in the middle seventh century and monumental paintings applied in later centuries, a number of narrative scenes of conversion as the central theme were painted. There are remains of a painting of King Abgar of Edessa with the mandylion, while on the same wall there is a painting of Constantine the Great on horseback holding the sign of the cross in his first battle as a Christian. The paintings are making a clear statement: Constantine was the first Christian Roman emperor but Edessa had a Christian king almost three centuries before. On an opposite wall fragments are preserved of Gregory the Illuminator's conversion of the Armenians. The unique conversion scenes were probably painted as a carefully planned addition after the eight century, covering scenes of the Pentecost, and it is possible that the church building had a geographical symbolism as Ethiopia is equaled with the south, Armenia with the north, and Byzantium and Edessa with the east.{{Cite book |last1=Innemée |first1=Karel C. |last2=Rompay |first2=Lucas Van |last3=Zielińska |first3=Dobrochna |date=2024 |chapter=The Church of the Virgin in Dayr Al-Suryān (Wadi Al-Natrun): Architecture, Art, and History between Coptic and Syriac Christianity |editor-last=Bolman |editor-first=Elizabeth S. |editor-last2=Johnson |editor-first2=Scott Fitzgerald |editor-last3=Tannous |editor-first3=Jack |title=Worlds of Byzantium: Religion, Culture, and Empire in the Medieval near East |publisher=Cambridge University Press |isbn=978-1-108-49209-6 |pages=281–322 }} The first Armenian Christian king Tiridates the Great is absent from the depiction.

File:Roman Orpheus Taming Wild Animals.jpg (2nd century AD) with inscriptions in the Aramaic language]]

Though most of Osroene's rulers were from the Abgarid dynasty of Arab origin, the kingdom's population was of mixed culture, being Syriac-speaking from the earliest times.{{sfn|Healey|2014|p=394-396}} Though Arab cults were attested at Edessa (the twins Monimos and Azizos), its cultural setting was fundamentally Syriac, alongside strong Greek and Parthian influences.{{sfn|Lieu|1997|p=174-175}}{{sfn|Sartre|2005|page=500}}{{sfn|Healey|2014|p=396}} Thus, according to Maurice Sartre: "It would hence be absurd to regard Edessa as solely an Arab city, for its culture owed very little to the nomadic Arabs of the region".{{sfn|Sartre|2005|page=500}} Later, within the Roman Empire, Edessa was the most important center of Syriac Christianity.{{sfn|Keser-Kayaalp|Drijvers|2018|p=516–518}} Under the Nabataean dynasties, Osroëne became increasingly influenced by Syriac Christianity,{{sfn|Harrak|1992|p=209–214}} and was a centre of local reaction against Hellenism.

In his writings, Pliny the Elder refers to the natives of Osroene and Commagene as Arabs and the region as Arabia.H. I. MacAdam, N. J. Munday, "Cicero's Reference to Bostra (AD Q. FRAT. 2. 11. 3)", Classical Philology, pp.131-136, 1983. Abgar II is called "an Arab phylarch" by Plutarch,{{cite web|last1=Ring|first1=Steven|title=History of Syriac texts and Syrian Christianity - Table 1|url=http://www.syriac.talktalk.net/chron_tab1.html|website=www.syriac.talktalk.net|access-date=2018-02-26|archive-url=https://web.archive.org/web/20180227034200/http://www.syriac.talktalk.net/chron_tab1.html|archive-date=2018-02-27}} while Abgar V is described as "king of the Arabs" by Tacitus.Guscin, Mark (2016). The Tradition of the Image of Edessa. Cambridge Scholars Publishing. p. 13.

The Edessene onomastic contains many Arabic names.{{sfn|Drijvers|1980|p=153}} The most common one in the ruling dynasty of Edessa being Abgar, a well-attested name among Arabic groups of antiquity.Retso, Jan (2013). The Arabs in Antiquity: Their History from the Assyrians to the Umayyads. Routledge. p. 419."Abgar, is a well-known name among Arabic-speaking groups in antiquity, the Nabataeans included." Some members of the dynasty bore Iranian names, while others had Arabic names.{{sfn|Segal|1982|p=210–213}} Judah Segal notes that the names ending in "-u" are "undoubtedly Nabatean".{{sfn|Segal|1982|p=210–213}} The Abgarid dynasts spoke "a form of Aramaic".{{sfn|Segal|1982|p=210–213}}

It was in the region in which the legend of Abgar V originated.

The area of the kingdom was perhaps roughly coterminous with that of the Roman province of Osrhoene. The great loop of the Euphrates was a natural frontier to the north and west. In the south Batnae was capital of the semi-autonomous principality of Anthemusias until its annexation by Rome, in AD 115. The eastern boundary is uncertain; it may have extended to Nisibis or even to Adiabene in the first century AD. Ḥarrān, however, only 40 km south of Edessa, always maintained its independent status as a Roman colonia.{{sfn|Segal|1982|p=210–213}}

Edessa, the capital of the ancient kingdom, was a fortress of considerable strength and a staging post both large and nearest to the Euphrates. It was an important road junction; an ancient highway, along which caravans carried merchandise from China and India to the West, meeting there a north–south road connecting the Armenian Highlands with Antioch. Inevitably, Edessa figured prominently on the international stage.{{sfn|Segal|1982|p=210–213}}

In 64 BC, as Pompey waged war on the Parthian Empire, Abgar II of Osrhoene had sided with the Romans when Lucius Afranius occupied Upper Mesopotamia. The king was initially an ally of the Roman general Marcus Licinius Crassus in his campaign against the Parthians in 53 BC, but Roman historians allege that he betrayed Crassus by leading him to deviate from his safe route along the river and instead into an open desert, where the troops suffered from the barrenness and thus were vulnerable to cavalry attack. Abgar is said to have met with Surenas, the Parthian general, and informed him of the Roman movements. The enormous and infamous Battle of Carrhae followed and destroyed the entire Roman army. Just prior to the battle, Abgar made a pretext to ride away. However, modern historians have questioned whether Abgar intended to betray the Romans and instead may have simply been leading them along an old Arab trade route.Sheldon, Mary Rose, "Intelligence Activities in Ancient Rome: Trust in the Gods But Verify", pg. 92 According to a Syriac source, Abgar died later that year.{{sfn|Segal|1982|p=210–213}}

In the early 2nd century AD, King Abgar VII joined the Emperor Trajan's campaign into Mesopotamia and entertained him at court. The king later rebelled against the Romans, however, which led to the Roman general Lucius Quietus sacking Edessa and putting an end to Osrhoene's independence in 116. In 123, during the reign of Hadrian, the Abgarid dynasty was restored with the installation of Ma'nu VII, and Osroene was established as a client kingdom of the Empire.Ball, W (2001). Rome in the East: the transformation of an empire. Routledge. p. 90. After the Roman–Parthian War of 161–166 under Marcus Aurelius, forts were built and a Roman garrison was stationed in Nisibis. In 195, following a civil war in which the kingdom had supported his rival Pescennius Niger, Septimius Severus mounted an invasion and annexed the territory as a new province, making Nisibis the capital.Southern, Pat, "The Empress Zenobia: Palmyra's Rebel Queen", 2009: pg. 36 However, the emperor did allow the king, Abgar XI, to retain the city of Edessa and a small territory surrounding it.Birley, Anthony, "Septimius Severus: The African Emperor", 1999: pg. 115 In 213, the reigning king was deposed by Caracalla, and the remaining territory was incorporated into the Roman province of Osroene.Sinclair, T.A., "Eastern Turkey: An Architectural & Archaeological Survey, Volume IV: pg. 196

According to legends (without historical justification), by 201 AD or earlier, under King Abgar the Great, Osroene became the first Christian state.Cheetham, Samuel (1905). A History of the Christian Church During the First Six Centuries. Macmillan and Co. p. 58.Lockyer, Herbert (1988). All the Apostles of the Bible. Zondervan. p. 260. {{ISBN|0-310-28011-7}}. It is believed that the Gospel of Thomas emanated from Edessa around 140. Prominent early Christian figures have lived in and emerged from the region such as Tatian the Assyrian, who came to Edessa from Hadiab (Adiabene). He made a trip to Rome and returned to Edessa around 172–173. Tatian was the editor of the Diatessaron, which was the primary sacred text of Syriac-speaking Christianity until in the 5th century the bishops Rabbula and Theodoret suppressed it and substituted a revision of the Old Syriac Canonical Gospels (as in the Syriac Sinaiticus and Curetonian Gospels).L.W. Barnard, The Origins and Emergence of the Church in Edessa during the First Two Centuries A.D., Vigiliae Christianae, pp.161-175, 1968 (see pp. 162,165,167,169).

Then, Edessa was again brought under Roman control by Decius and it was made a center of Roman operations against the Sasanian Empire. Amru, possibly a descendant of Abgar, is mentioned as king in the Paikuli inscription, recording the victory of Narseh in the Sassanid civil war of 293. Historians identify that Amru as Amru ibn Adi, the fourth king of the Lakhmids, which was then still based in Harran, not yet moved to al-Hirah in southern Mesopotamia.A. T. Olmstead, "The Mid-Third Century of the Christian Era. II", Classical Philology (1942): 398-420 (see p. 399)

Many centuries later, Dagalaiphus and Secundinus duke of Osrhoene, accompanied Julian in his war against the Sasanian emperor, Shapur II, in the 4th century.E. Gibbon, The Decline And Fall Of The Roman Empire, Vol. I, Chapter XXIV [http://www.ccel.org/ccel/gibbon/decline/volume1/chap24.htm] {{Webarchive|url=https://web.archive.org/web/20070204021349/http://www.ccel.org/ccel/gibbon/decline/volume1/chap24.htm|date=2007-02-04}}.

File:Osroene.png, highlighted within the Roman Empire]]

File:Roman-Persian Frontier, 5th century.png, in the 5th century]]

{{Main|Osroene (Roman province)}}

The independence of the state ended probably in {{circa|214}}; during Caracalla's reign the monarchy was abolished by the Roman Empire and Osroene was incorporated it as a province (colonia).{{sfn|Segal|1982|p=210–213}} It was a frontier province, lying close to the Persian empires with which the Romans were repeatedly at war, and was taken and retaken several times. As it was on the frontier it had a Roman legion stationed there. Legio III Parthica and its Castrum (homebase) may have been Rhesaina, but that is uncertain.

Following Emperor Diocletian's tetrarchy reform during his reign (284-305), it was part of the diocese of the East, in the praetorian prefecture of the same name.

According to the late-4th-century Notitia Dignitatum, it was headed by a governor of the rank of praeses, and it was also the seat of the dux Mesopotamiae, who ranked as vir illustris and commanded (c. 400) the following army units:

• Equites Dalmatae Illyriciani, garrisoned at Ganaba.
• Equites Promoti Illyriciani, Callinicum.
• Equites Mauri Illyriciani, Dabana.
• Equites Promoti indigenae, Banasam
• Equites Promoti indigenae, Sina Iudaeorum.
• Equites Sagittarii indigenae, Oraba.
• Equites Sagittarii indigenae, Thillazamana.
• Equites Sagittarii indigenae Medianenses, Mediana.
• Equites Primi Osrhoeni, Rasin.
• Praefectus legionis quartae Parthicae, Circesium.
• (an illegible command, possibly Legio III Parthica), Apatna.

as well as, 'on the minor roll', apparently auxiliaries:

• Ala Septima Valeria Praelectorum, Thillacama.
• Ala Prima Victoriae, Tovia -contra Bintha.
• Ala Secunda Paflagonum, Thillafica.
• Ala Prima Parthorum, Resaia.
• Ala Prima nova Diocletiana, inter Thannurin et Horobam.
• Cohors Prima Gaetulorum, Thillaamana.
• Cohors Prima Eufratensis, Maratha.
• Ala Prima Salutaria, Duodecimo constituta.

According to Sozomen's Ecclesiastical History, "there were some very learned men who formerly flourished in Osroene, as for instance Bardaisan, who devised a heresy designated by his name, and his son Harmonius. It is related that this latter was deeply versed in Grecian erudition, and was the first to subdue his native tongue to meters and musical laws; these verses he delivered to the choirs" and that Arianism, a more successful heresy, met with opposition there.

File:Abgar Revers.JPG (193-211)]]

File:Coin of King Abgar X Phraates of Edessa.jpg (238-244)]]

{{Main|Abgarid dynasty}}

{{EB1911 poster|Osroene}}

{{Portal|Christianity}}

• Edessa
• Aramaic language
• Syriac language
• Syriac Christianity
• Syria (region)
• Diocese of the Orient

{{Notelist}}

{{Reflist}}

{{Refbegin|2}}

• {{Cite book|last=Andrade|first=Nathanael J.|title=Syrian Identity in the Greco-Roman World|year=2013|location=Cambridge|publisher=Cambridge University Press|isbn=978-1-107-24456-6|url=https://books.google.com/books?id=4ROhAQAAQBAJ}}
• {{Cite book|last=Drijvers|first=Hendrik J. W.|title=Cults and Beliefs at Edessa|year=1980|location=Leiden|publisher=Brill|isbn=90-04-06050-2|url=https://books.google.com/books?id=69YUAAAAIAAJ}}
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• Sommer, Michael (2018). Roms orientalische Steppengrenze. Palmyra – Edessa – Dura Europos – Hatra. Eine Kulturgeschichte von Pompeius bis Diocletian [Rome's oriental steppe frontier. Palmyra – Edessa – Dura Europos – Hatra. A cultural history from Pompey to Diocletian]. 2nd edition. Stuttgart: Franz Steiner, {{ISBN|978-3-515-11681-7}}, esp. pp. 227–271.

{{Refend}}

• [http://www.intratext.com/IXT/LAT0212/_P20.HTM Notitia dignitatum]

{{Coord|37.1583|N|38.7917|E|source:wikidata|display=title}}

{{Assyrian topics}}

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