The History of the Kings of Britain

Geoffrey of Monmouth and the Invention of Britain's Glorious Past

Few books have exercised so profound an influence upon the imagination of the English-speaking world as Geoffrey of Monmouth's Historia Regum Britanniae. Written in elegant Latin around the year 1136, this single work contrived, almost single-handedly, to give medieval Britain a coherent and heroic national story – one that stretched back through the centuries to the fall of Troy and forward to the golden age of King Arthur.

Geoffrey, a Welsh cleric of considerable learning who rose to become bishop of St Asaph, presented his chronicle as a sober translation from an ancient British book lent to him by Walter, archdeacon of Oxford. No such book has ever been found, and scholars are now unanimous that Geoffrey was practising a form of literary invention that was not uncommon in his day. Yet the audacity of the claim only heightened the work's authority in an age that craved written proof of ancient lineage.

What Geoffrey delivered was nothing less than a continuous narrative of British kings from the arrival of Brutus, great-grandson of Aeneas, to the final triumph of the Saxons in the seventh century. In doing so he filled a yawning gap. The Normans who ruled England after 1066 possessed no equivalent to the grand origin myths claimed by the French or the Germans. Geoffrey supplied one – and in the process created a past so compelling that it was accepted as history for centuries.

The Early Kings and the Foundation of Britain

The chronicle opens with the exile of Brutus from Italy after he has unwittingly slain his father. Guided by the goddess Diana in a dream, he sails to a distant island inhabited by giants. There he founds New Troy (later London) and establishes a dynasty of British monarchs. We meet Dunvallo Molmutius, the lawgiver whose statutes were said still to be observed in Geoffrey's time; Bladud, the founder of Bath and a dabbler in necromancy; and above all Leir, whose story of division among three daughters would one day furnish Shakespeare with the tragedy of King Lear.

These early reigns are frankly fabulous, yet they serve a serious purpose: to demonstrate an ancient sovereignty and a continuous line of legitimate rule long before the Saxons set foot on British soil.

The Age of Arthur and the Wizard Merlin

It is with the arrival of Merlin and Arthur that the Historia reaches its dramatic climax. Merlin, born of a mortal woman and an incubus, yet choosing the path of righteousness, emerges first as a prophetic child who explains the meaning of the red and white dragons discovered beneath Vortigern's tower – the red representing the Britons, the white the Saxons, with ultimate victory promised to the native line.

Merlin then engineers the conception of Arthur by disguising Uther Pendragon so that he may lie with Igerna at Tintagel. Arthur himself is portrayed as a conqueror of continental Europe, a founder of the Round Table (though Geoffrey mentions it only in passing), and a king whose court at Caerleon dazzles with chivalric splendour. His final battle at Camlann against his treacherous nephew Mordred marks the end of Britain's imperial moment.

The Saxon Conquest and the Twilight of British Rule

The later books record the steady advance of the Saxons under Hengist and Horsa, the heroic but doomed resistance of Ambrosius Aurelianus and Uther, and the ultimate collapse of British power. Geoffrey does not disguise the tragedy: the golden age is over, the island's ancient glory eclipsed. Yet the prophecy of eventual British restoration lingers – a promise that would comfort generations of Welsh patriots and later Tudor propagandists.

The Astonishing Legacy

For all its inventions, the Historia Regum Britanniae was an immediate sensation. Manuscripts multiplied; French and English translations appeared within decades. Geoffrey's Arthur became the Arthur of romance; his Merlin the archetypal wizard of European literature. Shakespeare borrowed Leir; the Tudors claimed descent from Brutus to legitimise their rule; Malory drew upon the work to shape the Morte d'Arthur.

Critics – from William of Malmesbury in Geoffrey's own lifetime to Polydore Vergil in the sixteenth century – exposed the fictions. Yet the book was never wholly discredited. Its power lay not in accuracy but in vision: it gave Britain a usable past, a story of ancient greatness that could inspire pride and identity at a time when such things were urgently needed.

In the end, Geoffrey of Monmouth did not merely record history; he created a myth so potent that it has outlived every attempt to disprove it. The Historia Regum Britanniae remains one of the supreme acts of literary imagination in the medieval world – a work that, for better or worse, helped to make the British understand themselves as heirs to an heroic antiquity.