The "Historia Regum Britanniae" (English: The History of the Kings of Britain) is a pseudo-historical account of British history, written circa 1136 by Geoffrey of Monmouth. It chronicles the lives of the kings of the Britons in a chronological narrative spanning a time of two thousand years, beginning with the Trojans founding the British nation and continuing until the Anglo-Saxons assumed control of much of Britain around the 7th century. Geoffrey's account can be seen to be wildly inaccurate - but it remains a valuable piece of medieval literature, which contains the earliest known version of the story of King Lear and his three daughters, and introduced non-Welsh-speakers to the legend of King Arthur.Geoffrey of Monmouth (circa 1100 - 1155) was a cleric and one of the major figures in the development of British historiography and the popularity of tales of King Arthur. He is best known for his chronicle Historia Regum Britanniae ("History of the Kings of Britain"), which was widely popular in its day and was credited, well into the 16th century, being translated into various other languages from its original Latin.