Twenty Roman Age home-made sherds from Central Italian San Potito locality were studied by petrographic microscopic method. The ceramics were divided into five petrographic groups on the basis of their composition and structural-textural features. Two groups of the ceramics were tempered with clasts of alkaline volcanic origin, which seem to originate from Central-Italian volcanic territory components. The ceramics belonging to the other three groups contained large amounts of limestone and carbonatic fossils, the origin of the raw material was a marine clayish sediment, perhaps flysch.
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