<Tr> <Th> Personages </Th> <Td> See, e.g., List of legendary kings of Britain </Td> </Tr> <Tr> <Td_colspan="2"> Adapted and translated, e.g., by Wace, Layamon and the authors of the Brut y Brenhinedd . </Td> </Tr> <P> Historia regum Britanniae (The History of the Kings of Britain), originally called De gestis Britonum (On the Deeds of the Britons), is a pseudohistorical (fictitious) account of British history, written around 1136 by Geoffrey of Monmouth . It chronicles the lives of the kings of the Britons over the course 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 . It is one of the central pieces of the Matter of Britain . </P> <P> Although credited uncritically well into the 16th century, it is now considered to have no value as history . When events described, such as Julius Caesar's invasions of Britain, can be corroborated from contemporary histories, Geoffrey's account can be seen to be wildly inaccurate . It remains, however, a valuable piece of medieval literature, which contains the earliest known version of the story of King Lear and his three daughters, and helped popularise the legend of King Arthur . </P>

Who wrote the history of the kings of britian