| (?)537 | Battle of Camlann |
| c. 570 | Death of Gildas the Wise |
| (?)573 | Battle of Arfderydd |
| c. 828 | Historia Brittonum |
| c. 1135 | Geoffrey of Monmouth, Prophetiae Merlini |
| c. 1136 | Geoffrey of Monmouth, De gestis Britonum |
| (?)1148-1150 | Geoffrey of Monmouth, Vita Merlini |
| 1167-1169 | Henry II’s campaigns in Brittany |
| c. 1169 | Stephen of Rouen, Normannicus Draco |