A number of medieval chronicles of the history of Wales survive, notably the 9th century Historia Brittonum and the 10th century Annales Cambriae . These early chronicles are written in Latin, while from the 12th century, some are composed in Middle Welsh. The oldest surviving manuscripts of chronicles kept in the National Library of Wales, Aberystwyth date to the 13th century.
The history of Wales becomes tangible from the 7th century. Accounts in the chronicles pertaining to Dark Age Wales of the 5th and 6th century, including early references to King Arthur, Vortigern, Maelgwn Gwynedd and others, may contain semi-legendary or semi-historical material, which however cannot be substantiated as historical with any certainty.
Brut y Brenhinedd is the title given to Middle Welsh versions of Geoffrey of Monmouth's Historia Regum Britanniae . Brut y Tywysogion is a continuation of Historia Regum Britanniae, covering the period of 682 to 1332. The Brenhinoedd y Saeson survives in 14th-century manuscripts and covers events from 682 to 1282.
The Annals of Owain Glyndwr give an account of the Glyndŵr Rising, covering the period of 1400 to 1422.
Geoffrey of Monmouth was a cleric from Monmouth, Wales, and one of the major figures in the development of British historiography and the popularity of tales of King Arthur. He is best known for his chronicle The History of the Kings of Britain which was widely popular in its day, being translated into other languages from its original Latin. It was given historical credence well into the 16th century, but is now considered historically unreliable.
Brutus, also called Brute of Troy, is a legendary descendant of the Trojan hero Aeneas, known in medieval British legend as the eponymous founder and first king of Britain. This legend first appears in the Historia Brittonum, an anonymous 9th-century historical compilation to which commentary was added by Nennius, but is best known from the account given by the 12th-century chronicler Geoffrey of Monmouth in his Historia Regum Britanniae.
Beli Mawr was an ancestor figure in Middle Welsh literature and genealogies. He is the father of Cassivellaunus, Arianrhod, Lludd Llaw Eraint, Llefelys, and Afallach. In certain medieval genealogies he is listed as the son or husband of Anna, cousin of Mary, mother of Jesus. According to the Welsh Triads, Beli and Dôn were the parents of Arianrhod, but the mother of Beli's other children—and the father of Dôn's other children—is not mentioned in the medieval Welsh literature. Several royal lines in medieval Wales traced their ancestry to Beli. The Mabinogi names Penarddun as a daughter of Beli Mawr, but the genealogy is confused; it is possible she was meant to be his sister rather than daughter.
The Battle of Camlann is the legendary final battle of King Arthur, in which Arthur either died or was fatally wounded while fighting either alongside or against Mordred, who also perished. The original legend of Camlann, inspired by a purportedly historical event said to have taken place in the early 6th-century Britain, appears only in vague mentions found in several medieval Welsh texts dating since around the 10th century. The battle's much more detailed depictions have emerged since the 12th century, generally based on that of a catastrophic conflict described in the pseudo-chronicle Historia Regum Britanniae. The further greatly embellished variants originate from the later French chivalric romance tradition, in which it became known as the Battle of Salisbury, and include the 15th-century telling in Le Morte d'Arthur that remains popular today.
Historia regum Britanniae, originally called De gestis Britonum, is a pseudohistorical account of British history, written around 1136 by Geoffrey of Monmouth. It chronicles the lives of the kings of the Britons over the course of two thousand years, beginning with the Trojans founding the British nation and continuing until the Anglo-Saxons assumed control of much of Britain around the 7th century. It is one of the central pieces of the Matter of Britain.
Peredur is the name of a number of men from the boundaries of history and legend in sub-Roman Britain. The Peredur who is most familiar to a modern audience is the character who made his entrance as a knight in the Arthurian world of Middle Welsh prose literature.
Vortimer, also known as Saint Vortimer, is a figure in British tradition, a son of the 5th-century Britonnic ruler Vortigern. He is remembered for his fierce opposition to his father's Saxon allies. In Geoffrey of Monmouth's Historia Regum Britanniae, he overthrows his father and reigns as King of Britain for a brief period before his death restores Vortigern to power.
Aurelius Conanus or Aurelius Caninus was a Brittonic king in 6th-century sub-Roman Britain. The only certain historical record of him is in the writings of his contemporary Gildas, who excoriates him as a tyrant. However, he may be identified with one of the several similarly named figures active in Britain during this period. In the 12th century Geoffrey of Monmouth adapted Gildas' account for his chronicle Historia Regum Britanniae, and thereafter Aurelius Conanus was remembered as a legendary King of Britain.
Cador is a legendary Duke of Cornwall, known chiefly through Geoffrey of Monmouth's pseudohistorical Historia Regum Britanniae and previous manuscript sources such as the Life of Carantoc. In Welsh genealogical records, he appears as Cado (Cadwr), the son of Cornish king Geraint. Early sources present him as a relative of King Arthur, though the details of their kinship are usually left unspecified.
Brut y Tywysogion is one of the most important primary sources for Welsh history. It is an annalistic chronicle that serves as a continuation of Geoffrey of Monmouth’s Historia Regum Britanniae. Brut y Tywysogion has survived as several Welsh translations of an original Latin version, which has not itself survived. The most important versions are the one in Robert Vaughan's Peniarth MS. 20 and the slightly less complete one in the Red Book of Hergest. The version entitled Brenhinoedd y Saeson combines material from the Welsh annals with material from an English source.
The Treason of the Long Knives is an account of a massacre of British Celtic chieftains by Anglo-Saxon soldiers at a peace conference on Salisbury Plain in the 5th century. The story is thought to be pseudohistorical as the only surviving records mentioning it are centuries later in the semi-mythological histories of the Historia Brittonum and the Historia Regum Britanniae. Though a popular cautionary tale in medieval Europe, there is no other historical evidence for The Treason of the Long Knives. Most historians interpret the story as a purely literary construction.
The Brut or Roman de Brut by the poet Wace is a loose and expanded translation in almost 15,000 lines of Norman-French verse of Geoffrey of Monmouth's Latin History of the Kings of Britain. It was formerly known as the Brut d'Engleterre or Roman des Rois d'Angleterre, though Wace's own name for it was the Geste des Bretons, or Deeds of the Britons. Its genre is equivocal, being more than a chronicle but not quite a fully-fledged romance. It narrates a largely fictional version of Britain's story from its settlement by Brutus, a refugee from Troy, who gives the poem its name, through a thousand years of pseudohistory, including the story of king Leir, up to the Roman conquest, the introduction of Christianity, and the legends of sub-Roman Britain, ending with the reign of the 7th-century king Cadwallader. Especially prominent is its account of the life of King Arthur, the first in any vernacular language, which instigated and influenced a whole school of French Arthurian romances dealing with the Round Table – here making its first appearance in literature – and with the adventures of its various knights.
The Battle of Chester was a major victory for the Anglo-Saxons over the native Britons near the city of Chester, England in the early 7th century. Æthelfrith of Northumbria annihilated a combined force from the Welsh kingdoms of Powys and Rhôs, and possibly from Mercia as well. It resulted in the deaths of Welsh leaders Selyf Sarffgadau of Powys and Cadwal Crysban of Rhôs. Circumstantial evidence suggests that King Iago of Gwynedd may have also been killed. Other sources state the battle may have been in 613 or even as early as 607 or 605 AD.
Llefelys is a character in Welsh mythology appearing in the medieval Welsh tale Cyfranc Lludd a Llefelys. In the tale, Llefelys is king of Gaul while his brother Lludd is king of Britain. The tale appears in the Red Book of Hergest and the White Book of Rhydderch, the source texts for the Mabinogion, and embedded into various versions of the Brut y Brenhinedd, the Welsh adaptation of Geoffrey of Monmouth's Historia Regum Britanniae.
Pridwen was, according to the 12th-century writer Geoffrey of Monmouth, King Arthur's shield; it was adorned with an image of the Virgin Mary. Geoffrey's description of it draws on earlier Welsh traditions found in Preiddeu Annwfn, Culhwch and Olwen, and the Historia Brittonum. The shield is also named and described by Wace, Layamon, Roger of Wendover and Robert of Gloucester among other medieval writers, and it directly inspired the description of Sir Gawain's shield in Sir Gawain and the Green Knight.
Caradoc of Llancarfan was a Welsh cleric and author associated with Llancarfan in Wales in the 12th century. He is generally seen as the author of a Life of Gildas and a Life of Saint Cadog, in Latin.
Brut y Brenhinedd is a collection of variant Middle Welsh versions of Geoffrey of Monmouth's Latin Historia Regum Britanniae. About 60 versions survive, with the earliest dating to the mid-13th century. Adaptations of Geoffrey's Historia were extremely popular throughout Western Europe during the Middle Ages, but the Brut proved especially influential in medieval Wales, where it was largely regarded as an accurate account of the early history of the Celtic Britons.
Lludd and Llefelys is a Middle Welsh prose tale written down in the 12th or 13th century; it was included in the Mabinogion by Lady Charlotte Guest in the 19th century. It tells of the Welsh hero Lludd Llaw Eraint, best known as King Lud son of Heli in Geoffrey of Monmouth's Historia Regum Britanniae, and his brother Llefelys.
Walter of Oxford was a cleric and writer. He served as archdeacon of Oxford in the 12th century. Walter was a friend of Geoffrey of Monmouth, who claimed he got his chief source for the Historia Regum Britanniae from him.