Julius Africanus, under the emperor Marcus Aurelius Antonius, was the first among us to compose, using a simple style of history, a brief chronology organized according to generations and reigns. From there, Bishop Eusebius of Caesaria and the priest Jerome of holy memory edited a multipart history of the canons of chronicles organized according to reigns and times. After these came others, in particular, Bishop Victor of Tunnunna who, having reviewed the histories of the previous times, filled out the deeds of succeeding ages up to the consolate of Justin the Younger. We have recorded here, as briefly as we were able, a summary of the times from the beginning of the world up to the principates of the emperor Heraclius and of King Sisebut of the Goths, laying down, bit by bit, the descending order of times, so that, by means of the information provided, the whole of the past ages might be known.