By the middle of the 6th century (565) when Justin II succeeded Emperor Justinian on the Byzantine throne, Christianity had completely prevailed over the cult of Dionysus and Byzantine wine was at its apogee. Wine, which was no longer called “oenos” but “krasi”, would reach Constantinople from all over Greece, originating mainly in the Peloponnese, Rhodes, Chios and Lesvos. In his “Geoponica”, Cassianus Bassus would collect all data available at the time on agricultural matters. Four centuries later, his work, which also contained a wealth of information on viticulture, was reviewed and its improved version included in a larger project commissioned by Emperor Constantine VII Porphyrogenitus.