Offa of Mercia - Government

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-seventh century, for example, Penda had placed royal kinsmen in control of conquered provinces. 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. 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.

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. 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 lands from all obligations except the requirement to build forts and bridges—obligations which lay upon everyone, as part of the trinoda necessitas. Offa's Kentish charters show him laying these same burdens on the recipients of his grants there, and this may be a sign that the obligations were being spread outside Mercia. These burdens were part of Offa's response to the threat of "pagan seaman".

Offa issued laws in his name, but no details of them have survived. They are known only from a mention by Alfred the Great, in the preface to Alfred's own law code. Alfred says that he has included in his code those laws of Offa, Ine of Wessex and Æthelberht of Kent which he found "most just". The laws may have been an independent lawcode, but it is also possible that Alfred is referring to the report of the legatine mission in 786, which issued statutes that the Mercians undertook to obey.