Offa of Mercia
Offa was King of Mercia, a kingdom of Anglo-Saxon England, from 757 until his death in 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 Jænberht, 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 Jænberht 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. 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 historian Simon Keynes, "Offa was driven by a lust for power, not a vision of English unity; and what he left was a reputation, not a legacy." His son Ecgfrith succeeded him after his death, 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. 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.The power and prestige that Offa attained made him one of the most significant rulers in early medieval Britain, 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. 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. 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. 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.
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. 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. 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. These letters in particular reveal Offa's relations with the continent, as does his coinage, which was based on Carolingian examples.
Ancestry and family
Offa's ancestry is given in the Anglian collection, a set of genealogies that include lines of descent for four Mercian kings. All four lines descend from Pybba, who ruled Mercia early in the 7th century. Offa's line descends through Pybba's son Eowa and then through three more generations: Osmod, Eanwulf and Offa's father, Thingfrith. Æthelbald, who ruled Mercia for most of the forty years before Offa, was also descended from Eowa according to the genealogies: Offa's grandfather, Eanwulf, was Æthelbald's first cousin. Æthelbald granted land to Eanwulf in the territory of the Hwicce, and it is possible that Offa and Æthelbald were from the same branch of the family. In one charter Offa refers to Æthelbald as his kinsman, and Headbert, Æthelbald's brother, continued to witness charters after Offa rose to power.Offa's wife was Cynethryth, whose ancestry is unknown. The couple had a son, Ecgfrith, and at least three daughters: Ælfflæd, Eadburh and Æthelburh. It has been speculated that Æthelburh was the abbess who was a kinswoman of King Ealdred of the Hwicce, but there are other prominent women named Æthelburh during that period.
Early reign, the midland territories and the Middle and East Saxons
Æthelbald, who had ruled Mercia since 716, was assassinated in 757. According to a later continuation of Bede's Historia Ecclesiastica the king was "treacherously murdered at night by his own bodyguards", though the reason why is unrecorded. Æthelbald was initially succeeded by Beornred, about whom little is known. The continuation of Bede comments that Beornred "ruled for a little while, and unhappily", and adds that "the same year, Offa, having put Beornred to flight, sought to gain the kingdom of the Mercians by bloodshed." It is possible that Offa did not gain the throne until 758, however, since a charter of 789 describes Offa as being in the thirty-first year of his reign.The conflict over the succession suggests that Offa needed to re-establish control over Mercia's traditional dependencies, such as the Hwicce and the Magonsæte. Charters dating from the first two years of Offa's reign show the Hwiccan kings as reguli, or kinglets, under his authority; and it is likely that he was also quick to gain control over the Magonsæte, for whom there is no record of an independent ruler after 740. Offa was probably able to exert control over the kingdom of Lindsey at an early date, as it appears that the independent dynasty of Lindsey had disappeared by this time.
Little is known about the history of the East Saxons during the 8th century, but what evidence there is indicates that both London and Middlesex, which had been part of the kingdom of Essex, were finally brought under Mercian control during the reign of Æthelbald. Both Æthelbald and Offa granted land in Middlesex and London as they wished; in 767 a charter of Offa's disposed of land in Harrow without a local ruler as witness. It is likely that both London and Middlesex were quickly under Offa's control at the start of his reign. The East Saxon royal house survived the 8th century, so it is probable that the kingdom of Essex retained its native rulers, but under strong Mercian influence, for most or all of the 8th century.
It is unlikely that Offa had significant influence in the early years of his reign outside the traditional Mercian heartland. The overlordship of the southern English which had been exerted by Æthelbald appears to have collapsed during the civil strife over the succession, and it is not until 764, when evidence emerges of Offa's influence in Kent, that Mercian power can be seen expanding again.
Kent and Sussex
Offa appears to have exploited an unstable situation in Kent after 762. Kent had a long tradition of joint kingship, with east and west Kent under separate kings, though one king was typically dominant. Prior to 762 Kent was ruled by Æthelberht II and Eadberht I; Eadberht's son Eardwulf is also recorded as a king. Æthelberht died in 762, and Eadberht and Eardwulf are last mentioned in that same year. Charters from the next two years mention other kings of Kent, including Sigered, Eanmund and Heahberht. In 764, Offa granted land at Rochester in his own name, with Heahberht on the witness list as king of Kent. Another king of Kent, Ecgberht, appears on a charter in 765 along with Heahberht; the charter was subsequently confirmed by Offa. Offa's influence in Kent at this time is clear, and it has been suggested that Heahberht was installed by Offa as his client. There is less agreement among historians on whether Offa had general overlordship of Kent thereafter. He is known to have revoked a charter of Ecgberht's on the grounds that "it was wrong that his thegn should have presumed to give land allotted to him by his lord into the power of another without his witness", but the date of Ecgberht's original grant is unknown, as is the date of Offa's revocation of it. It may be that Offa was the effective overlord of Kent from 764 until at least 776. The limited evidence for Offa's direct involvement in the kingdom between 765 and 776 includes two charters of 774 in which he grants land in Kent; but there are doubts about their authenticity, so Offa's intervention in Kent prior to 776 may have been limited to the years 764–65.The Anglo-Saxon Chronicle records that "the Mercians and the inhabitants of Kent fought at Otford" in 776, but does not give the outcome of the battle. It has traditionally been interpreted as a Mercian victory, but there is no evidence for Offa's authority over Kent until 785: a charter from 784 mentions only a Kentish king named Ealhmund, which may indicate that the Mercians were in fact defeated at Otford. The cause of the conflict is also unknown: if Offa was ruling Kent before 776, the battle of Otford was probably a rebellion against Mercian control. However, Ealhmund does not appear again in the historical record, and a sequence of charters by Offa from the years 785–89 makes his authority clear. During these years he treated Kent "as an ordinary province of the Mercian kingdom", and his actions have been seen as going beyond the normal relation of overlordship and extending to the annexation of Kent and the elimination of a local royal line. After 785, in the words of one historian, "Offa was the rival, not the overlord, of Kentish kings". Mercian control lasted until 796, the year of Offa's death, when Eadberht Præn was temporarily successful in regaining Kentish independence.
Ealhmund was probably the father of Egbert of Wessex, and it is possible that Offa's interventions in Kent in the mid-780s are connected to the subsequent exile of Egbert to Francia. The Chronicle claims that when Egbert invaded Kent in 825, the men of the southeast turned to him "because earlier they were wrongly forced away from his relatives". This is likely to be an allusion to Ealhmund, and may imply that Ealhmund had a local overlordship of the southeastern kingdoms. If so, Offa's intervention was probably intended to gain control of this relationship and take over the dominance of the associated kingdoms.
The evidence for Offa's involvement in the kingdom of Sussex comes from charters, and as with Kent there is no clear consensus among historians on the course of events. What little evidence survives that bears on Sussex's kings indicates that several kings ruled at once, and it may never have formed a single kingdom. It has been argued that Offa's authority was recognised early in his reign by local kings in western Sussex, but that eastern Sussex submitted to him less readily. Symeon of Durham, a twelfth-century chronicler, records that in 771 Offa defeated "the people of Hastings", which may record the extension of Offa's dominion over the entire kingdom. However, doubts have been expressed about the authenticity of the charters which support this version of events, and it is possible that Offa's direct involvement in Sussex was limited to a short period around 770–71. After 772, there is no further evidence of Mercian involvement in Sussex until c. 790, and it may be that Offa gained control of Sussex in the late 780s, as he did in Kent.