History of the Britons (Historia Brittonum)

"History of the Britons (Historia Brittonum)" by Nennius is a historical account written in the early medieval period, specifically during the late 8th century. The book primarily discusses the history and origins of the Britons, including their interactions with other groups such as the Saxons, Scots, and Picts. It serves as an essential source for understanding early British history and the cultural and political landscape of Britain following the Roman withdrawal. In this work, Nennius presents a mixture of myth, tradition, and historical accounts, outlining the arrival of various peoples in Britain, particularly focusing on the Britons' legendary ancestor, Brutus of Troy. The narrative includes significant figures such as King Arthur and various battles against invading forces, notably the Saxons. Nennius aims to preserve the history of his people amidst what he sees as a decline in their glorious past, attributing Britain's early governance and conflicts to divine providence while also highlighting the need for unity and piety in the face of external threats. His compilation draws from several sources, blending oral history with written records to craft a cohesive account of Britain's early narrative. (This is an automatically generated summary.)

Nennius – or Nemnius or Nemnivus – was a Welsh monk of the 9th century. He has traditionally been attributed with the authorship of the Historia Brittonum, based on the prologue affixed to that work. This attribution is widely considered a secondary (10th-century) tradition.