Qinnasrin (Arabic: قنسرين, Syriac: ܩܢܫܪܝܢ, Qinnašrīn, also rendered Qinshren, Qinnashrin, Qenneshren; Latin: Chalcis ad Belum), was a historical town in northern Syria. The town was situated 25 km south west of Aleppo on the west bank of the Queiq River and was connected to Aleppo with a major road during Roman times.
The ancient Chalcis was the seat of a minor Roman client kingdom under three tetrarchs of the Herodian dynasty, Herod of Chalcis (died AD 48), Herod Agrippa II (ruler of Chalcis from 48-53), and Aristobulus of Chalcis (ruler of Chalcis from 57-92). Chalcis was the birthplace of 3rd century Neoplatonist philosopher Iamblichus and Rabbula, a bishop of Edessa from 411 to August 435.
The city was a Christian bishopric from an early stage, at first a suffragan of Seleucia Pieria, but later raised to the dignity of autocephalous archdiocese. The names of several of its bishops are known, from that of 3rd-century Tranquillus to that of Probus, who lived at the end of the 6th century and whom Emperor Mauritius Tiberius sent as his envoy to the Persian king Chosroes I. Later it became an important religious and cultural center of Syriac Christianity, gaining fame for its school of theology and monastery until the 10th century.
In Late Antiquity, it belonged to the province of Syria Prima. Its importance was due to its strategic location, both as a caravan stop and as part of the frontier zone (limes) with the desert. In 540, the Sassanid shah Khosrau I appeared before the city and extracted 200 pounds of gold as ransom in return for sparing the city. This prompted the emperor Justinian I to order its fortifications rebuilt, a work undertaken by Isidore the Younger (a nephew of Isidore of Miletus) in ca. 550.
The Sassanids occupied the city in 608/9, during the Byzantine–Sassanid War of 602–628, and kept it until the war's end. Barely ten years later, in 636/7, it fell to the Arabs after a brief resistance.
Under the Umayyad Caliphate, the city became the center of one of the districts into which Arab Syria was divided, the Jund Qinnasrin. The town was repeatedly attacked and sacked by the Byzantines during the latter stages of the Arab–Byzantine wars, in 966, 998 and 1030, and then destroyed by the Seljuq Turks towards the end of the 11th century. Qinnasrin never recovered from the latter, and survived only as an arsenal and caravansarai before being finally deserted.
Its ruins lie under the modern Syrian village of Hadir.
- Echos d'Orient X, 1907, p. 144
- Michel Lequien, Oriens christianus in quatuor Patriarchatus digestus, Paris 1740, Vol. II, coll. 785-788
- Chabot in Revue de l'Orient chrétien, 6 (1901), p. 202.
- Mango, Marlia M. (1991). "Chalkis ad Belum". In Kazhdan, Alexander. The Oxford Dictionary of Byzantium. Oxford University Press. p. 406. ISBN 978-0-19-504652-6.
- Phenix, Robert R. (2008). The sermons on Joseph of Balai of Qenneshrin: rhetoric and interpretation in fifth-century Syriac literature. Mohr Siebeck. pp. 52–54. ISBN 978-3-16-149676-9.