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Concept
Edessa
Summary
Edessa (ɪˈdɛsə, ; Édessa) was an ancient city (polis) in Upper Mesopotamia, founded during the Hellenistic period by King Seleucus I Nicator (305-281), founder of the Seleucid Empire. It later became capital of the Kingdom of Osroene, and continued as capital of the Roman province of Osroene. In Late Antiquity, it became a prominent center of Christian learning and seat of the Catechetical School of Edessa. During the Crusades, it was the capital of the County of Edessa.
The city was situated on the banks of the Daysan River (Scirtus; Kara Koyun), a tributary of the Khabur, and was defended by Şanlıurfa Castle, the high central citadel.
Ancient Edessa is the predecessor of modern Urfa (Şanlıurfa; Riha; ar-Ruhā; Urha), in the Şanlıurfa Province, Turkey. Modern names of the city are likely derived from Urhay or Orhay (ʾŪrhāy / ʾŌrhāy), the site's Syriac name before the re-foundation of the settlement by Seleucus I Nicator. After the defeat of the Seleucids in the Seleucid–Parthian Wars, Edessa became capital of the Kingdom of Osroene, with a mixed Syriac and Hellenistic culture. The origin of the name of Osroene itself is probably related to Orhay.
The Roman Republic began exercising political influence over the Kingdom of Osroene and its capital Edessa from 69 BC. It became a Roman colonia in 212 or 213, though there continued to be local kings of Osroene until 243 or 248. In Late Antiquity, Edessa was an important city on the Roman–Persian frontier with the Sasanian Empire. It resisted the attack of Shapur I (240-270) in his third invasion of Roman territory. The 260 Battle of Edessa saw Shapur defeat the Roman emperor Valerian (253-260) and capture him alive, an unprecedented disaster for the Roman state. The Late Antique Laterculus Veronensis names Edessa as the capital of the Roman province of Osroene. The Roman soldier and Latin historian Ammianus Marcellinus described the city's formidable fortifications and how in 359 it successfully resisted the attack of Shapur II (309-379).
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