Offa Of Mercia, Offa

Offa ( 29 July 796 AD) 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."Simon Keynes, "Offa", in ''Encyclopaedia of Anglo-Saxon England'', p. 340. His son Ecgfrith succeeded him after his death, but reigned for less than five months before Coenwulf of Mercia became king.

Geoffrey Hill's longform prose-poem ''Mercian Hymns'' takes Offa's life as its subject.

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 ; 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.

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.Yorke, ''Kings and Kingdoms'', p. 112.

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'' (written anonymously after Bede's death) 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."The "continuation of Bede" is by other hands than Bede's, though the first few entries may be by Bede himself. See 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.Kirby, ''Earliest English Kings'', p. 163.

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.Yorke, ''Kings and Kingdoms'', p. 113. 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.Stenton, ''Anglo-Saxon England'', pp. 204–205; the charter itself is translated in Whitelock, ''English Historical Documents'', 73, p. 461. It is likely that both London and Middlesex were quickly under Offa's control at the start of his reign.Kirby, ''Earliest English Kings'', p. 164. 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.Yorke, ''Kings and Kingdoms'', p. 50.

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.Stenton, ''Anglo-Saxon England'', p. 206.

Kent and Sussex

Offa appears to have exploited an unstable situation in Kent after 762.Kirby, ''Earliest English Kings'', p. 165. Kent had a long tradition of joint kingship, with east and west Kent under separate kings, though one king was typically dominant.Yorke, ''Kings and Kingdoms'', p. 32. 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.Stenton, ''Anglo-Saxon England'', pp. 206–207. 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.The evidence comes from a charter of Coenwulf of Mercia's in 799, in which he grants the land again, quoting the grounds on which Offa revoked it, but without giving any date. The charter is translated in Whitelock, ''English Historical Documents'', 80, p. 470. 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.Kirby quotes Stenton's comment that Ecgberht was "a mere dependant" of Offa's, and gives his opinion that there is "no certain evidence" of this. On the other hand, Keynes agrees with Stenton that Offa "ookcontrol of Kent in the 760s". Simon Keynes, "Offa", in Lapidge, ''Blackwell Encyclopaedia of Anglo-Saxon England'', p. 340; Stenton, ''Anglo-Saxon England'', p. 207; Kirby, ''Earliest English Kings'', pp. 165–166.

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.Stenton, ''Anglo-Saxon England'', p. 207–208; Kirby, ''Earliest English Kings'', p. 165. 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",Kirby, ''Earliest English Kings'', pp. 166–167; Stenton, ''Anglo-Saxon England'', pp. 207–208. 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".The quote is from Patrick Wormald, "Bede, the ''Bretwaldas'', and the origin of the ''Gens Anglorum''", in Wormald et al., ''Ideal and Reality'', p. 113, quoted in Kirby, ''Earliest English Kings'', p. 167. 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".Swanton, ''Anglo-Saxon Chronicle'', p. 60. 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.Kirby, ''Earliest English Kings'', p. 168.

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 (the area around Hastings) 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.Stenton, ''Anglo-Saxon England'', p. 208; Whitelock, ''English Historical Documents'', p. 243. 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.Kirby gives details of the problems with the charters, and also suggests that the situation in Kent and Sussex at this time may be connected with the entry for 823 in the ''Anglo-Saxon Chronicle'' which asserts that the southeastern kingdoms were "wrongly forced away" from the kinsmen of Egbert of Wessex, who was the son of king Ealhmund of Kent. Kirby, ''Earliest English Kings'', pp. 167–168; see also Swanton, ''Anglo-Saxon Chronicle'', p. 60.

East Anglia, Wessex and Northumbria

In East Anglia, Beonna probably became king in about 758. Beonna's first coinage predates Offa's own, and implies independence from Mercia. Subsequent East Anglian history is quite obscure, but in 779 Æthelberht II became king, and was independent long enough to issue coins of his own.Kirby, ''Earliest English Kings'', pp. 164, 166. In 794, according to the ''Anglo-Saxon Chronicle'', "King Offa ordered King Æthelberht's head to be struck off". Offa minted pennies in East Anglia in the early 790s, so it is likely that Æthelberht rebelled against Offa and was beheaded as a result.Yorke, ''Kings and Kingdoms'', p. 64. Accounts of the event have survived in which Aethelberht is killed through the machinations of Offa's wife Cynethryth, but the earliest manuscripts in which these possibly legendary accounts are found date from the 11th and 12th centuries, and recent historians do not regard them with confidence.Stenton, ''Anglo-Saxon England'', p. 210; Kirby, ''Earliest English Kings'', p. 177; see also Zaluckyj & Zaluckyj, "The Age of Mercian Supremacy", in Zaluckyj et al., ''Mercia'', pp. 152–153, which gives the details of the earliest versions of the legend. The legend also claims that Æthelberht was killed at Sutton St. Michael and buried to the south at Hereford, where his cult flourished, becoming at one time second only to Canterbury as a pilgrimage destination.Blair, ''Church in Anglo-Saxon Society'', p. 288.Zaluckyj & Zaluckyj, "The Age of Mercian Supremacy", in Zaluckyj et al., ''Mercia'', p. 153.

To the south of Mercia, Cynewulf came to the throne of Wessex in 757 and recovered much of the border territory that Æthelbald had conquered from the West Saxons. Offa won an important victory over Cynewulf at the Battle of Bensington (in Oxfordshire) in 779, reconquering some of the land along the Thames.Stenton, ''Anglo-Saxon England'', p. 209. No indisputably authentic charters from before this date show Cynewulf in Offa's entourage, and there is no evidence that Offa ever became Cynewulf's overlord. In 786, after the murder of Cynewulf, Offa may have intervened to place Beorhtric on the West Saxon throne. Even if Offa did not assist Beorhtric's claim, it seems likely that Beorhtric to some extent recognised Offa as his overlord shortly thereafter.Yorke, ''Kings and Kingdoms'', p. 141. Offa's currency was used across the West Saxon kingdom, and Beorhtric had his own coins minted only after Offa's death.Blackburn & Grierson, ''Early Medieval Coinage'', pp. 281–282. In 789, Beorhtric married Eadburh, a daughter of Offa; the ''Chronicle'' records that the two kings combined to exile Egbert to Francia for "three years", adding that "Beorhtric helped Offa because he had his daughter as his queen".Swanton, ''Anglo-Saxon Chronicle'', p. 62. Some historians believe that the ''Chronicle''s "three years" is an error, and should read "thirteen years", which would mean Egbert's exile lasted from 789 to 802, but this reading is disputed.E.g. Fletcher assumes that Egbert spent essentially all Beorhtric's reign in Francia; see Fletcher, ''Who's Who'', p. 114. Similarly, Swanton annotates "3 years" with "in fact thirteen years ... this error is common to all MSS." See note 12 in Swanton, ''Anglo-Saxon Chronicle'', pp. 62–63. On the other hand, Stenton accepts the figure as three: see Stenton, ''Anglo-Saxon England'', p. 220. Stenton adds in a footnote that "it is very dangerous to reject a reading which is so well attested". Eadburh is mentioned by Asser, a 9th-century monk who wrote a biography of Alfred the Great: Asser says that Eadburh had "power throughout almost the entire kingdom", and that she "began to behave like a tyrant after the manner of her father".Keynes & Lapidge, ''Alfred the Great'', p. 71. Whatever power she had in Wessex was no doubt connected with her father's overlordship.Yorke, ''Kings and Kingdoms'', p. 147.

If Offa did not gain the advantage in Wessex until defeating Cynewulf in 779, it may be that his successes south of the river were a necessary prerequisite to his interventions in the south-east. In this view, Egbert of Kent's death in about 784 and Cynewulf's death in 786 were the events that allowed Offa to gain control of Kent and bring Beorhtric into his sphere of influence. This version of events also assumes that Offa did not have control of Kent after 764–65, as some historians believe.

Offa's marital alliances extended to Northumbria when his daughter Ælfflæd married Æthelred I of Northumbria at Catterick in 792.Kirby, ''Earliest English Kings'', p. 154. However, there is no evidence that Northumbria was ever under Mercian control during Offa's reign.

Wales and Offa's Dyke

Offa was frequently in conflict with the various Welsh kingdoms. There was a battle between the Mercians and the Welsh at Hereford in 760, and Offa is recorded as campaigning against the Welsh in 778, 784 and 796 in the tenth-century ''Annales Cambriae''.Annales Cambriae, ''sub anno'' 760, 778 and 784.Stenton, ''Anglo-Saxon England'', pp. 214–215.

The best known relic associated with Offa's time is Offa's Dyke, a great earthen barrier that runs approximately along the border between England and Wales. It is mentioned by the monk Asser in his biography of Alfred the Great: "a certain vigorous king called Offa ... had a great dyke built between Wales and Mercia from sea to sea".Asser, ''Alfred the Great'', ch. 14, p. 71. The dyke has not been dated by archaeological methods, but most historians find no reason to doubt Asser's attribution.Margaret Worthington, "Offa's Dyke", in Lapidge, ''Blackwell Encyclopaedia of Anglo-Saxon England'', p. 341. Early names for the dyke in both Welsh and English also support the attribution to Offa.Stenton, ''Anglo-Saxon England'', p. 213. Despite Asser's comment that the dyke ran "from sea to sea", it is now thought that the original structure only covered about two-thirds of the length of the border: in the north it ends near Llanfynydd, less than from the coast, while in the south it stops at Rushock Hill, near Kington in Herefordshire, less than from the Bristol Channel. The total length of this section is about . Other earthworks exist along the Welsh border, of which Wat's Dyke is one of the largest, but it is not possible to date them relative to each other and so it cannot be determined whether Offa's Dyke was a copy of or the inspiration for Wat's Dyke.Margaret Worthington, "Wat's Dyke", in Lapidge et al., ''Blackwell Encyclopaedia of Anglo-Saxon England'', p. 468.

The construction of the dyke suggests that it was built to create an effective barrier and to command views into Wales. This implies that the Mercians who built it were free to choose the best location for the dyke. There are settlements to the west of the dyke that have names that imply they were English by the 8th century, so it may be that in choosing the location of the barrier the Mercians were consciously surrendering some territory to the native Britons.Stenton cites, for example, the village "Burlingjobb", in Powys, not far from the south end of the dyke, as having a name unlikely to have risen as late as the 9th century. Stenton, ''Anglo-Saxon England'', p. 214. Alternatively, it may be that these settlements had already been retaken by the Welsh, implying a defensive role for the barrier. The effort and expense that must have gone into building the dyke are impressive, and suggest that the king who had it built (whether Offa or someone else) had considerable resources at his disposal. Other substantial construction projects of a similar date do exist, however, such as Wat's Dyke and Danevirke, in what is now Germany as well as such sites as Stonehenge from millennia earlier. The dyke can be regarded in the light of these counterparts as the largest and most recent great construction of the preliterate inhabitants of Britain.Patrick Wormald, "Offa's Dyke", in James Campbell et al., ''The Anglo-Saxons'', pp. 120–121.

Church

Offa ruled as a Christian king, but despite being praised by Charlemagne's advisor, Alcuin, for his piety and efforts to "instruct is peoplein the precepts of God",Whitelock, ''English Historical Documents'', 198, p. 783. he came into conflict with Jænberht, the Archbishop of Canterbury. Jænberht had been a supporter of Ecgberht II of Kent, which may have led to conflict in the 760s when Offa is known to have intervened in Kent. Offa rescinded grants made to Canterbury by Egbert, and it is also known that Jænberht claimed the monastery of Cookham, which was in Offa's possession.Yorke, ''Kings and Kingdoms'', pp. 116–117.

In 786 Pope Adrian I sent papal legates to England to assess the state of the church and provide canons (ecclesiastical decrees) for the guidance of the English kings, nobles and clergy. This was the first papal mission to England since Augustine had been sent by Pope Gregory the Great in 597 to convert the Anglo-Saxons.Stenton, ''Anglo-Saxon England'', pp. 215–216. The legates were Bishop George of Ostia, and Theophylact, the bishop of Todi. They visited Canterbury first, and then were received by Offa at his court. Both Offa and Cynewulf, king of the West Saxons, attended a council where the goals of the mission were discussed. George then went to Northumbria, while Theophylact visited Mercia and "parts of Britain". A report on the mission, sent by the legates to Pope Adrian, gives details of a council held by George in Northumbria, and the canons issued there, but little detail survives of Theophylact's mission. After the northern council George returned to the south and another council was held, attended by both Offa and Jænberht, at which further canons were issued.Kirby, ''Earliest English Kings'', p. 170.

In 787, Offa succeeded in reducing the power of Canterbury through the establishment of a rival archdiocese at Lichfield. The issue must have been discussed with the papal legates in 786, although it is not mentioned in the accounts that have survived. The ''Anglo-Saxon Chronicle'' reports a "contentious synod" in 787 at Chelsea, which approved the creation of the new archbishopric. It has been suggested that this synod was the same gathering as the second council held by the legates, but historians are divided on this issue. Hygeberht, already Bishop of Lichfield, became the new archdiocese's first and only archbishop, and by the end of 788 he received the pallium, a symbol of his authority, from Rome.Stenton, ''Anglo-Saxon England'', pp. 217–218 & 218 notes 3 & 4. The new archdiocese included the sees of Worcester, Hereford, Leicester, Lindsey, Dommoc and Elmham; these were essentially the midland Anglian territories. Canterbury retained the sees in the south and southeast.Kirby, ''Earliest English Kings'', p. 174.

The few accounts of the creation of the new archbishopric date from after the end of Offa's reign. Two versions of the events appear in the form of an exchange of letters between Coenwulf, who became king of Mercia shortly after Offa's death, and Pope Leo III, in 798. Coenwulf asserts in his letter that Offa wanted the new archdiocese created out of enmity for Jænberht; but Leo responds that the only reason the papacy agreed to the creation was because of the size of the kingdom of Mercia.Whitelock, ''English Historical Documents'', 204 & 205, pp. 791–794. Both Coenwulf and Leo had their own reasons for representing the situation as they did: Coenwulf was entreating Leo to make London the sole southern archdiocese, while Leo was concerned to avoid the appearance of complicity with the unworthy motives Coenwulf imputed to Offa. These are therefore partisan comments. However, both the size of Offa's territory and his relationship with Jænberht and Kent are indeed likely to have been factors in Offa's request for the creation of the new archdiocese.Kirby, ''Earliest English Kings'', pp. 169–170. Coenwulf's version has independent support, with a letter from Alcuin to Archbishop Æthelheard giving his opinion that Canterbury's archdiocese had been divided "not, as it seems, by reasonable consideration, but by a certain desire for power".Whitelock, ''English Historical Documents'', 203, pp. 788–790. Æthelheard himself later said that the award of a pallium to Lichfield depended on "deception and misleading suggestion".Whitelock, ''English Historical Documents'', 210, pp. 799–800.

Another possible reason for the creation of an archbishopric at Lichfield relates to Offa's son, Ecgfrith of Mercia. After Hygeberht became archbishop, he consecrated Ecgfrith as king; the ceremony took place within a year of Hygeberht's elevation.Swanton, ''Anglo-Saxon Chronicle'', sub anno 785, pp. 52–54. It is possible that Jænberht refused to perform the ceremony, and that Offa needed an alternative archbishop for that purpose.Kirby, ''Earliest English Kings'', p. 173. The ceremony itself is noteworthy for two reasons: it is the first recorded consecration of any English king, and it is unusual in that it asserted Ecgfrith's royal status while his father was still alive. Offa would have been aware that Charlemagne's sons, Pippin and Louis, had been consecrated as kings by Pope Adrian,Stenton, ''Anglo-Saxon England'', pp. 218–219. and probably wished to emulate the impressive dignity of the Frankish court.Yorke, ''Kings and Kingdoms'', p. 115. Other precedents did exist: Æthelred of Mercia is said to have nominated his son Coenred as king during his lifetime, and Offa may have known of Byzantine examples of royal consecration.

Despite the creation of the new archdiocese, Jænberht retained his position as the senior cleric in the land, with Hygeberht conceding his precedence.Stenton, ''Anglo-Saxon England'', p. 218. When Jænberht died in 792, he was replaced by Æthelheard, who was consecrated by Hygeberht, now senior in his turn. Subsequently, Æthelheard appears as a witness on charters and presides at synods without Hygeberht, so it appears that Offa continued to respect Canterbury's authority.Kirby, ''Earliest English Kings'', p. 172.

A letter from Pope Adrian to Charlemagne survives which makes reference to Offa, but the date is uncertain; it may be as early as 784 or as late as 791. In it Adrian recounts a rumour that had reached him: Offa had reportedly proposed to Charlemagne that Adrian should be deposed, and replaced by a Frankish pope. Adrian disclaims all belief in the rumour, but it is clear it had been a concern to him.Stenton, ''Anglo-Saxon England'', p. 215. The enemies of Offa and Charlemagne, described by Adrian as the source of the rumour, are not named. It is unclear whether this letter is related to the legatine mission of 786; if it predates it, then the mission might have been partly one of reconciliation, but the letter might well have been written after the mission.Kirby, ''Earliest English Kings'', p. 171.

Offa was a generous patron of the church, founding several churches and monasteries, often dedicated to St Peter.Yorke, ''Kings and Kingdoms'', p. 116. Among these was St Albans Abbey, which he probably founded in the early 790s. He also promised a yearly gift of 365 mancuses to Rome; a mancus was a term of account equivalent to thirty silver pennies, derived from Abbasid gold coins that were circulating in Francia at the time.Stenton, ''Anglo-Saxon England, p. 223. Control of religious houses was one way in which a ruler of the day could provide for his family, and to this end Offa ensured (by acquiring papal privileges) that many of them would remain the property of his wife or children after his death. This policy of treating religious houses as worldly possessions represents a change from the early 8th century, when many charters showed the foundation and endowment of small minsters, rather than the assignment of those lands to laypeople. In the 770s, an abbess named Æthelburh (who may have been the same person as Offa's daughter of that name) held multiple leases on religious houses in the territory of the Hwicce; her acquisitions have been described as looking "like a speculator assembling a portfolio". Æthelburh's possession of these lands foreshadows Cynethryth's control of religious lands, and the pattern was continued in the early 9th century by Cwoenthryth, the daughter of King Coenwulf.Blair, ''Church in Anglo-Saxon Society'', pp. 129–30.

Either Offa or Ine of Wessex is traditionally supposed to have founded the Schola Saxonum in Rome, in what is today the Roman rione, or district, of Borgo. The Schola Saxonum took its name from the militias of Saxons who served in Rome, but it eventually developed into a hostelry for English visitors to the city.Keynes & Lapidge, ''Alfred the Great'', p. 244.

European connections

Offa's diplomatic relations with Europe are well documented, but appear to belong only to the last dozen years of his reign. In letters dating from the late 780s or early 790s, Alcuin congratulates Offa for encouraging education and greets Offa's wife and son, Cynethryth and Ecgfrith.Kirby, ''Earliest English Kings'', p. 175.Whitelock, ''English Historical Documents'', 195, pp. 779–780. In about 789, or shortly before, Charlemagne proposed that his son Charles marry one of Offa's daughters, most likely Ælfflæd. Offa countered with a request that his son Ecgfrith should also marry Charlemagne's daughter Bertha: Charlemagne was outraged by the request, and broke off contact with Britain, forbidding English ships from landing in his ports. Alcuin's letters make it clear that by the end of 790 the dispute was still not resolved, and that Alcuin was hoping to be sent to help make peace. In the end diplomatic relations were restored, at least partly by the agency of Gervold, the abbot of St Wandrille.Stenton, ''Anglo-Saxon England'', p. 220.Whitelock, ''English Historical Documents'', 20, p. 313.

Charlemagne sought support from the English church at the council of Frankfurt in 794, where the canons passed in 787 at the Second Council of Nicaea were repudiated, and the heresies of two Spanish bishops, Felix and Elipandus, were condemned.Stenton, ''Anglo-Saxon England'', p. 219. In 796 Charlemagne wrote to Offa; the letter survives and refers to a previous letter of Offa's to Charlemagne. This correspondence between the two kings produced the first surviving documents in English diplomatic history. The letter is primarily concerned with the status of English pilgrims on the continent and with diplomatic gifts, but it reveals much about the relations between the English and the Franks. Charlemagne refers to Offa as his "brother", and mentions trade in black stones, sent from the continent to England, and cloaks (or possibly cloths), traded from England to the Franks.Whitelock, ''English Historical Documents'', 198, pp. 782–784. Charlemagne's letter also refers to exiles from England, naming Odberht, who was almost certainly the same person as Eadberht Præn, among them. Egbert of Wessex was another refugee from Offa who took shelter at the Frankish court. It is clear that Charlemagne's policy included support for elements opposed to Offa; in addition to sheltering Egbert and Eadberht he also sent gifts to Æthelred I of Northumbria.Kirby, ''Earliest English Kings'', pp. 176–177.

Events in southern Britain to 796 have sometimes been portrayed as a struggle between Offa and Charlemagne, but the disparity in their power was enormous. By 796 Charlemagne had become master of an empire which stretched from the Atlantic Ocean to the Great Hungarian Plain, and Offa and then Coenwulf were clearly minor figures by comparison.

Government

The nature of Mercian kingship is not clear from the limited surviving sources. There are two main theories regarding the ancestry of Mercian kings of this period. One is that descendants of different lines of the royal family competed for the throne. In the mid-7th century, for example, Penda had placed royal kinsmen in control of conquered provinces.Yorke, ''Kings and Kingdoms'', pp. 119–120 Alternatively, it may be that a number of kin-groups with local power-bases may have competed for the succession. The sub-kingdoms of the Hwicce, the Tomsæte and the unidentified Gaini are examples of such power-bases. Marriage alliances could also have played a part. Competing magnates, those called in charters "dux" or "princeps" (that is, leaders), may have brought the kings to power. In this model, the Mercian kings are little more than leading noblemen. Offa seems to have attempted to increase the stability of Mercian kingship, both by the elimination of dynastic rivals to his son Ecgfrith, and the reduction in status of his subject kings, sometimes to the rank of ealdorman.Yorke, ''Anglo-Saxons'', pp. 43–44. He was ultimately unsuccessful, however; Ecgfrith only survived in power for a few months, and ninth-century Mercia continued to draw its kings from multiple dynastic lines.Simon Keynes, "Mercia and Wessex in the Ninth Century", in Brown & Farr, ''Mercia'', p. 314.

There is evidence that Offa constructed a series of defensive ''burhs'', or fortified towns; the locations are not generally agreed on but may include Bedford, Hereford, Northampton, Oxford and Stamford. In addition to their defensive uses, these ''burhs'' are thought to have been administrative centres, serving as regional markets and indicating a transformation of the Mercian economy away from its origins as a grouping of midland peoples. The ''burhs'' are forerunners of the defensive network successfully implemented by Alfred the Great a century later to deal with the Danish invasions.Kirby, ''Earliest English Kings'', p. 3.Alan Vince, "Market Centres and Towns in the Mercian Hegemony", in Brown & Farr, ''Mercia'', p. 192. However, Offa did not necessarily understand the economic changes that came with the ''burhs'', so it is not safe to assume he envisioned all their benefits. In 749, Æthelbald of Mercia had issued a charter that freed ecclesiastical