When dealing with Isis, Serapis and the other members of the so-called ‘gens isiaca’, scholars have hesitated whether to emphasize their (indisputable) historico-geographic origin in the Nile valley or their (no less indisputable) character as Graeco-Roman cults. We thus find these deities referred to as ‘Egyptian’, ‘Graeco-Egyptian’, ‘Graeco-Roman’, ‘Greek’, ‘Roman’ and, again, ‘Oriental’, ‘Orientalized Roman’, and so on. Each of these definitions is evidently partial, which is one reason for the growing preference for the less specific terms ‘Isiac gods’ and ‘Isiac cults’. Yet even these elide the problem of how these cults were perceived in relation to Egypt. This article aims to challenge the terms of the conventional dichotomy between ...