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The present paper emphasizes the importance of measuring the oxygen isotopic and chemical compositions of ancient glass, in\udorder to constrain some features such as age, raw materials, and production technologies and to identify the “fingerprint” of local\udproductions. In this context, thirty-nine Roman and late Antique glass samples and eight chert samples fromnorthern Greece were\udselected and analysed for their oxygen isotopic and chemical compositions. Results show that the majority of glass samples are\udproduced using natron as flux and have 18O values of about 15.5‰, plus or minus a few tenths of one per mil, suggesting that raw\udmaterials probably come from Levantine area. Four samples are heavily enriched in 18O, and their chemical composition clearly\udshows that they were made with soda plant ash as flux. Isotopic and chemical data of Greek chert samples support the hypothesis\udof local production of the above samples. About half of the glass samples have chemical compositions, which allow their age to be\udconstrained to the late Antique period. For the remaining glass, similarities with literature compositional groups are reported and\uddiscussed

Chemical and Oxygen Isotopic Composition of Roman and Late Antique Glass from Northern Greece