Saint Gregory of Tours' comprehensive history of the Frankish people, who ruled over much of what is modern-day France and Germany, is published here in full with an original map and genealogical chart. Gregory's history of the Franks is valuable for having emerged when the events described were recent. As such this text, also known as Decem Libri Historiarum, has become one of the prime sources for historians of the so-called Dark Ages. Gregory provides a chronicle of Frankish monarchs, their lineage, principle battles, and the local Gallic culture. The Franks gradually assumed control of the governmental vacuum left by the crumbling Roman Empire. First formally recognized as an authority by the Roman Empire in the 4th century, less than two centuries later the Romans had all but ceded control of their Western Empire. This left many of the tribes previously denigrated as 'barbarians' to assume full control.