The Significance of ṛtācā brzmniy in Xerxes’ Cultic Reform

Abstract Ever since its preliminary publication, Xerxes’ “Daiva” inscription (XPh) has been seen as an important and unique witness to early Achaemenid Mazdean orthopraxy and cultic propaganda. It is an essential document that captures a major reform in Achaemenid-Zoroastrian cult patterns and its relationship to cognate cults. This royal inscription describes a liturgical reform or, at least, the enforcement of such a reform, targeting and condemning the cult of the daivā —a designation describing competing deities. The key to decoding this reform hinges upon an obscure expression that appears thrice in the document—normalized as a-r-t-a-c-a : b-r-z-m-n-i-y—the meaning of which is yet to be fully understood. In this article, I revisit and analyze the various approaches previously taken to interpreting this remarkable syntagm and provide a methodological approach and a broader and more comprehensive translation which is presented in a more holistic comparative context—including onomastic, epigraphic and archeological data.