Mosaic production in the Hellenistic period can be divided into two broad regional types, eastern and western, on the basis of stylistic and technical differences that are derived from varying local traditions of paving. The characteristics of these schools are outlined, and the earliest mosaics at Pompeii are shown to be derived from the western Greek tradition. However, comparison of the Pompeian floors with contemporary mosaics from Greek sites also reveals a significant difference: the first Pompeian mosaics consist almost exclusively of figured scenes set into relatively plain pavements, whereas in Greek mosaics abstract decoration is much more common, and figural motifs are the exception rather than the rule. These differences reflect...