573Centuries: 5th century - 6th century - 7th century
- A young monk is ordained. In 590 he will become Pope Gregory I, known as "the Great"
- The Battle of Arfderydd between Gwenddolau and Gwrgi and Peredur, the sons of Eliffer. The forces of Gwenddolau were slaughtered, and Myrddin went mad watching this defeat.