When referring to Byzantine pottery we must specify the provenance of the product we have in mind. My personal research has convinced me that important ceramic art was developed and exercised not only in Constantinople but also in various other parts of mainland Greece. The mediaeval pottery of mainland Greece remains essentially unexplored and unknown, although it demonstrates rare characteristics of aesthetic value and together with Hispano-arabic pottery must be considered as the forerunner of modern European pottery. Furthermore, Greece lacks a museum exclusively dedicated to pottery, even if the finds from Corinth, Sparta, Olynthus, Thessaloniki, the shipwreck from Pelagonessos, Thebes, Rhodes Island, etc. would form a unique collection. This article represents only a compilation of an extensive study, however. Since this publication cannot contain the entire study, I have decided to present selected pieces of certain significant and instructive pottery from mainland Greece, which are kept in the Byzantine Museum of Athens. These selected pieces should persuade the reader that this pottery is in no way inferior to the ceramics of the rest of the Byzantine Empire. The pottery chosen derives: 1. From excavations in Thebes, carried out by Keramopoulos. 2. From excavations in Corinth, carried out by the American School of Classical Studies in Athens. Certain vases were conceded for publication to Philadelpheas.3. From excavations in Sicyon, carried out by Orlandos.