Part if the pottery exchange network between Akrotiri on Thera and some other important sites of the South Aegean was studied. Ceramic specimens found in the excavations of Akrotiri, Naxos, Phylakopi and Knossos were analysed by neutron activation. The pottery classes analysed from Akrotiri consisted of ceramics commonly abundant at the site and divided either according to the shape (e.g. stirrup jars, cooking pots, nippled ewers) or according to the type of ware (e.g. Middle Cycladic bichrome, Cycladic white, burnished ware). The statistical analysis results showed that the majority of the Akrotiri pottery formed two compositional groups, which represent two different clay sources. The Phylakopi group was chemically related to those of Akrotiri due to the similar geology of the islands, but they were clearly separable by multivariate analysis. The Phylakopi group contained a small number of pots found at Akrotiri. There was also importation to Akrotiri and Phylakopi form Minoan Crete, which dominated the Aegean during the Late Cycladic period, though this never exceeded local production. Finally, about 20per thousand of the Akrotiri specimens analysed did not cluster with any known provenance group, but probably came from various sources as a result of the many contexts Akrotiri had developed. In addition some characteristic samples were examined, using the scanning electron microscope, in order to obtain information concerning the technology of manufacture.