Offa of Mercia

Offa was the King of Mercia from 757 until his death in July 796. He was the son of Thingfrith and a descendant of Eowa, a brother of King Penda of Mercia, who had ruled over a century before. Offa came to the throne after a period of civil war following the assassination of Æthelbald, defeating Beornred, another claimant to the throne. In the early years of Offa's reign it is likely that he consolidated his control of midland peoples such as the Hwicce and the Magonsæte. After 762, he took advantage of instability in the kingdom of Kent to establish himself as overlord and was in control of Sussex by 771, though his authority did not remain unchallenged in either territory. In the 780s he extended Mercian supremacy over most of southern England, allying with Beorhtric of Wessex, who married Offa's daughter Eadburh, and regaining complete control of the southeast. He also became the overlord of East Anglia, and had King Æthelberht II of East Anglia beheaded in 794, perhaps for rebelling against him.

Offa was a Christian king, but came into conflict with the Church, and in particular with Jaenberht, the Archbishop of Canterbury. Offa managed to persuade Pope Adrian I to divide the archdiocese of Canterbury in two, creating a new archdiocese of Lichfield. This reduction in the power of Canterbury may have been motivated by Offa's desire to have an archbishop consecrate his son Ecgfrith of Mercia as king, since it is possible Jaenberht refused to perform the ceremony, which took place in 787. Offa had a dispute with the Bishop of Worcester which was settled in the Council of Brentford in 781.

Many surviving coins from Offa's reign carry elegant depictions of him and the artistic quality of these images exceeds that of the contemporary Frankish coinage. Some of his coins carry images of his wife, Cynethryth—the only Anglo-Saxon queen ever depicted on a coin. Only three gold coins of Offa's have survived: one is a copy of an Abbasid dinar of 774, and carries Arabic text on one side of the coin, with "Offa Rex" on the other side. The gold coins are of uncertain use but may have been struck to be used as alms or for gifts to Rome.