Excavation of a medieval shipwreck at Novy Svet, Crimea, Ukraine, revealed an exceptional quantity of glazed ceramics with sgraffito decoration which, according to chemical analysis, correspond to a single production provisionally named 'Novy Svet Ware'. Typological and analytical definitions are given. Its diffusion in the Crimea and extending to Turkey and the Levant, points to a main, as yet unlocated, workshop. The Novy Svet shipwreck suggests the persistence of large-scale diffusion of ceramics in the late-13th century, and demonstrates connections with the Black Sea, the Byzantine capital and territories, the Mediterranean and possibly the spice roads.