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Offa was King of Mercia, a kingdom of Anglo-Saxon England, from 757 until his death in July 796. The son of Thingfrith and a descendant of Eowa, Offa came to the throne after a period of civil war following the assassination of Æthelbald. Offa defeated the other claimant, Beornred. 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. Taking advantage of instability in the kingdom of Kent to establish himself as overlord, Offa also controlled 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 regained 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 who came into conflict with the Church, particularly with Jaenberht, the Archbishop of Canterbury. Offa persuaded 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 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 at 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, 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. Many historians regard Offa as the most powerful Anglo-Saxon king before Alfred the Great. His dominance never extended to Northumbria, though he gave his daughter Ælfflæd in marriage to the Northumbrian king Æthelred I in 792. Historians once saw his reign as part of a process leading to a unified England, but this is no longer the majority view. In the words of a recent historian: "Offa was driven by a lust for power, not a vision of English unity; and what he left was a reputation, not a legacy."〔Simon Keynes, "Offa", in ''Encyclopaedia of Anglo-Saxon England'', p. 340.〕 Offa died in 796; his son, Ecgfrith, succeeded him, but reigned for less than five months before Coenwulf of Mercia became king. ==Background and sources== In the first half of the 8th century, the dominant Anglo-Saxon ruler was King Æthelbald of Mercia, who by 731 had become the overlord of all the provinces south of the River Humber.〔Bede, ''HE'', V, 23, p. 324.〕 Æthelbald was one of a number of strong Mercian kings who ruled from the mid-7th century to the early 9th, and it was not until the reign of Egbert of Wessex in the 9th century that Mercian power began to wane.〔Simon Keynes, "Mercia", in Lapidge, ''Encyclopaedia of Anglo-Saxon England'', p. 307.〕 The power and prestige that Offa attained made him one of the most significant rulers in Early Medieval Britain,〔Richard Fletcher (''Who's Who'', p. 100) describes him as "by common consent the most imposing Anglo-Saxon ruler before Alfred".〕 though no contemporary biography of him survives.〔 A key source for the period is the ''Anglo-Saxon Chronicle'', a collection of annals in Old English narrating the history of the Anglo-Saxons. The ''Chronicle'' was a West Saxon production, however, and is sometimes thought to be biased in favour of Wessex; hence it may not accurately convey the extent of power achieved by Offa, a Mercian.〔Campbell, ''Anglo-Saxon State'', p. 144.〕 That power can be seen at work in charters dating from Offa's reign. Charters were documents which granted land to followers or to churchmen and were witnessed by the kings who had the authority to grant the land.〔Hunter Blair, ''Roman Britain'', pp. 14–15.〕〔Campbell, ''The Anglo-Saxons'', pp. 95–98.〕 A charter might record the names of both a subject king and his overlord on the witness list appended to the grant. Such a witness list can be seen on the Ismere Diploma, for example, where Æthelric, son of king Oshere of the Hwicce, is described as a "''subregulus''", or subking, of Æthelbald's.〔Whitelock, ''English Historical Documents'', 67, pp. 453–454.〕〔For a discussion showing the use of this in evidence in an account of the progression from Offa's overlordship of the Hwicce to suppression of the ruling dynasty, and consequent absorption of the kingdom into Mercia, see Patrick Wormald, "The Age of Offa and Alcuin", in Campbell et al., ''The Anglo-Saxons'', p. 123.〕 The eighth-century monk and chronicler the Venerable Bede wrote a history of the English church called ''Historia Ecclesiastica Gentis Anglorum''; the history only covers events up to 731, but as one of the major sources for Anglo-Saxon history it provides important background information for Offa's reign.〔Roger Ray, "Bede", in Lapidge et al., ''Blackwell Encyclopaedia of Anglo-Saxon England'', pp. 57–59.〕 Offa's Dyke, most of which was probably built in his reign, is a testimony to the extensive resources Offa had at his command and his ability to organise them.〔Yorke, ''Kings and Kingdoms'', p. 117.〕 Other surviving sources include a problematic document known as the Tribal Hidage, which may provide further evidence of Offa's scope as a ruler, though its attribution to his reign is disputed.〔Peter Featherstone, provides a review of some theories about the origins of the Tribal Hidage in "The Tribal Hidage and the Ealdormen of Mercia" in Brown & Farr, ''Mercia'', p. 29.〕 A significant corpus of letters dates from the period, especially from Alcuin, an English deacon and scholar who spent over a decade at Charlemagne's court as one of his chief advisors, and corresponded with kings, nobles and ecclesiastics throughout England.〔Michael Lapidge, "Alcuin of York", in Lapidge et al. ''Blackwell Encyclopaedia of Anglo-Saxon England'', p. 24.〕 These letters in particular reveal Offa's relations with the continent, as does his coinage, which was based on Carolingian examples.〔Patrick Wormald, "The Age of Offa and Alcuin", in Campbell et al., eds., ''The Anglo-Saxons'', pp. 110, 118.〕〔Sutherland ''English Coinage 600–1900'' p. 10.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Offa of Mercia」の詳細全文を読む スポンサード リンク
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