This paper offers a re-edition and reinterpretation of a Greek inscription painted on a wall at the Rivergate Church at Faras in medieval Nubia and dated to the thirteenth–fourteenth centuries. This dedicatory prayer is the first evidence for the existence of the female diaconate in the entire Nile Valley. While the close reading of the text in its architectural and art-historical settings allows us to formulate some hypotheses about the functions of Nubian deaconesses, in a broader perspective, the inscription is also a valuable piece of evidence for the high position of Nubian women on the one hand and the “Byzantineness” of Christian Nubian culture on the other.