A life-size bronze of a nude youth was discovered in a river in Asia Minor in the early 1960's. The bronze no longer had the iconographic attributes that it had once held in its hands, but the head presented features which made it possible to identity the figure as representing the god Dionysos. The sculptor drew upon earlier prototypes, specifically a figure called the Westmacott athlete, which has been tentatively attributed to the Greek sculptor Polykleitos. The head of the statue reflects a different, possibly female, prototype. An investigation of a group of Roman life-size and three quarter life-size bronzes reveals that the iconographic details which identity the Washington Bronze also place it outside the category of lamp hearers to which the majority of the other statues belong. The physiques of the majority of the lamp bearers and of the Washington Bronze, however, reflect the same Polykleitan prototypes. The identification of the Washington Bronze as a devotional rather than functional statue is made through a study of the literary, religious, and archaeological evidence. The evolution in the iconography of the god is traced through his portrayals on Greek vases and in Graeco-Roman bronze and marble statuary. The Bronze was created in the Eastern Roman Empire. Through a comparative analysis of other bronzes it can be dated within the period between the beginning of the Augustan era and the third quarter of the first century A. D. A setting in the home of a devotee of the Dionysian Mysteries is adduced.