This article is about the city in Mesopotamia. For the Greek city, see Edessa, Greece. For other uses, see Edessa (disambiguation).
The heritage of Roman Edessa survives today in these columns at the site of Urfa Castle, dominating the skyline of the modern city of Şanlı Urfa.
Edessa (Ancient Greek: Ἔδεσσα; Classical Syriac: ܐܘܪܗܝ Urhay; Armenian: Եդեսիա) is the historical name of an ancient town in upper Mesopotamia (modern-day Turkey), refounded on an ancient site by Seleucus I Nicator. For the modern history of the city, see Şanlıurfa.