In this article we offer an editio princeps of a new inscription from the Cycladic island of Paros and discuss its implications for understanding Parian co-operation with Dionysiοs I of Syracuse in the Adriatic in the early fourth century BCE. We argue that the text throws light on the Parian colonization of Pharos, and is related to activities of the Parians in the Adriatic in what seems to be the result of local Parian strife and strong anti-Athenian affiliations on Paros. We explore possible interpretations of the inscribed decree and their implications for the relationship between the Parians and Dionysios.