This study documents and analyses the structure and function of Greek incubation rituals in Classical and Hellenistic times addressing all relevant and extant literary and epigraphical testimonial concerning the rites and rules surrounding incubation. It shows that previous approaches, which treated incubation as a Chthonian phenomenon, as a rite of passage, or as comparable to initiation in mystery cults are not supported by the available testimonia on these rites. An analysis of the social context of the rites surrounding incubation shows they differed surprisingly little from the rites performed by other worshippers at these sanctuaries. Various ritual factors are explored in order to explain why ordinary, or low-intensity, rites could ...