Decades: 610s 620s 630s 640s 650s - 660s - 670s 680s 690s 700s 710s

Years: 664 665 666 667 668 - 669 - 670 671 672 673 674

• Theodore appointed Archibishop of Canterbury

• Justinian II, Byzantine emperor

• Hasan ibn Ali, grandson of Muhammad and second Shia Imam