Constantine was a minor king in 6th-century
sub-Roman Britain, who was remembered in later
British tradition as a
legendary King of Britain. The only contemporary information about him comes from
Gildas, who calls him king of
Damnonia (probably
Dumnonia) and castigates him for his various sins, including the murder of two "royal youths" inside a church. Much later,
Geoffrey of Monmouth included the figure in his pseudohistorical chronicle
Historia Regum Britanniae, adding fictional details to Gildas' account and making Constantine the successor to
King Arthur as King of Britain. Under the influence of Geoffrey, derivative figures appeared in a number of later works.
Additionally, several churches and chapels in Southwestern Britain and elsewhere were dedicated to a "
Saint Constantine", who was generally held to have been a king. While these do not all necessarily refer to the same person, at least some of them appear to reflect back to Gildas' Constantine.
History
Gildas mentions Constantine in chapters 28 and 29 of his 6th-century work
De Excidio et Conquestu Britanniae.
De Excidio et Conquestu Britanniae, ch. 28–29. He is one of five
Brythonic kings whom the author rebukes and compares to Biblical beasts. Constantine is called the "tyrannical whelp of the unclean lioness of Damnonia", a reference to books of
Daniel and the
Revelation, and apparently also...
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