Geoffrey of Monmouth was a Welsh cleric who played a pivotal role in the development of British historiography and the popularization of King Arthur tales. Much of his work is considered pseudo-history, focusing on chronicles of British kings and writings attributed to Merlin. His unique narrative style significantly shaped medieval perceptions of British history and Arthurian legend, cementing their place in literary tradition.
A classic epic poem in Latin, this work tells the story of Merlin Caliodonius, one of the most famous and enigmatic figures in Celtic mythology.