The aim of this article is to study the presence, the typology and the significance of the prophecies inside the early Byzantine (the IVth – beginning of the VII-th century) histories and chronicles. After a wide analysis of different types of historical sources the first important conclusion is that there were two cases of foretelling the future for a Byzantine historian: (1) asserting how an event from the past was foretold by an oracle, a prophet or a monk; (2) predicting events and realities that haven’t occurred yet. The first case pointed out to persons or instances that had possessed knowledge in the past about what was going to happen and thus susceptible to offer the same information again. The historians directed thus the interested readers to other types of texts (for instance, the apocalyptic ones) or to concrete persons (such as monks and saints). The second instance of prediction was more personal, since it stated events that hadn’t ever happened, and no one had any certain information about. There were four ways the Byzantine historian could predict the yet unknown future: (1) by interpreting different signs, the strange, the marvelous and the seeming symbolic events (such as: a new star, an earthquake, a monster etc); (2) by considering the eternal moral law of history – the good deeds are always rewarded, but the crimes won’t escape the divine punishment; (3) by asserting God’s plan regarding the human history, as moving from the day of the Creation towards the Last Judgment; (4) by receiving divine revelations, most often by means of special messengers (oracles, monks, saints). It can seem somehow queer looking that a historical text, dedicated to the narrative of the past, could offer suggestions about the future. Still, in the Byzantine Empire, it was one of its most important qualities because it resulted from the books and the ideas a historian was educated through. In fact, the whole ancient historiography, the Bible, the theological, ascetic and hagiographical writings made allusions to such ways of foretelling the future. One of the most important aims of writing and reading about the past was to get at least a glimpse into the unknown future.