: 5th century
- 6th century
- 7th century
Decades: 510s - 520s - 530s - 540s - 550s - 560s - 570s - 580s - 590s - 600s - 610s
Years: 568 569 570 571 572 573 574 575 576 577 578
- 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.