The Battle of Badon, also known as the Battle of Mons Badonicus, was purportedly fought between Britons and Anglo-Saxons in Post-Roman Britain during the late 5th or early 6th century. It was credited as a major victory for the Britons, stopping the westward encroachment of the Anglo-Saxon kingdoms for a period.
Gildas — also known as Gildas Badonicus, Gildas fab Caw and Gildas Sapiens — was a 6th-century British monk best known for his scathing religious polemic De Excidio et Conquestu Britanniae, which recounts the history of the Britons before and during the coming of the Saxons. He is one of the best-documented figures of the Christian church in the British Isles during the sub-Roman period, and was renowned for his Biblical knowledge and literary style. In his later life, he emigrated to Brittany, where he founded a monastery known as Saint-Gildas-de-Rhuys.
Maelgwn Gwynedd was King of Gwynedd during the early 6th century. Surviving records suggest he held a pre-eminent position among the Brythonic kings in Wales and their allies in the "Old North" along the Scottish coast. Maelgwn was a generous supporter of Christianity, funding the foundation of churches throughout Wales and even far beyond the bounds of his own kingdom. Nonetheless, his principal legacy today is the scathing account of his behavior recorded in De Excidio et Conquestu Britanniae by Gildas, who considered Maelgwn a usurper and reprobate. The son of Cadwallon Lawhir ap Einion and great-grandson of Cunedda, Maelgwn was buried on Ynys Seiriol, off the eastern tip of Anglesey, having died of the "yellow plague"; quite probably the arrival of Plague of Justinian in Britain.
Nennius – or Nemnius or Nemnivus – was a Welsh monk of the 9th century. He has traditionally been attributed with the authorship of the Historia Brittonum, based on the prologue affixed to that work. This attribution is widely considered a secondary (10th-century) tradition.
Amphibalus is a venerated early Christian priest said to have converted Saint Alban to Christianity. He occupied a place in British hagiography almost as revered as Alban himself. According to many hagiographical accounts, including those of Gildas, Bede, Geoffrey of Monmouth, and Matthew of Paris, Amphibalus was a Roman Christian fleeing religious persecution under Emperor Diocletian. Amphibalus was offered shelter by Alban in the Roman city of Verulamium, in modern-day England. Alban was so impressed with the priest's faith and teaching that he began to emulate him in worship, and eventually became a Christian himself. When Roman soldiers came to seize Amphibalus, Alban put on Amphibalus' robes and was punished in his place. According to Matthew Paris, after Alban's martyrdom, the Romans eventually caught and martyred Amphibalus as well.
The end of Roman rule in Britain occurred as the military forces of Roman Britain withdrew to defend or seize the Western Roman Empire's continental core, leaving behind an autonomous post-Roman Britain. In 383, the usurper Magnus Maximus withdrew troops from northern and western Britain, probably leaving local warlords in charge. In 407, usurper Constantine III took the remaining mobile Roman soldiers to Gaul in response to the crossing of the Rhine, and external attacks surged. The Romano-British deposed Roman officials around 410 and government largely reverted to the city level. That year Emperor Honorius refused an appeal from Britain for military assistance. The following decades saw the collapse of urban life and the beginning of Anglo-Saxon settlement.
Constantine was a 6th-century king of Dumnonia in sub-Roman Britain, who was remembered in later British tradition as a legendary King of Britain. The only contemporary information about him comes from Gildas, who castigated him for various sins, including the murder of two "royal youths" inside a church. The historical Constantine is also known from the genealogies of the Dumnonian kings, and possibly inspired the tradition of Saint Constantine, a king-turned-monk venerated in Southwest Britain and elsewhere.
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.
The historicity of King Arthur has been debated both by academics and popular writers. While there have been many claims that King Arthur was a real historical person, the current consensus among specialists on the period holds him to be a mythological or folkloric figure.
The Groans of the Britons is the final appeal made between 446 and 454 by the Britons to the Roman military for assistance against Pict and Scot raiders. The appeal is first referenced in Gildas' 6th-century De Excidio et Conquestu Britanniae; Gildas' account was later repeated in chapter 13 of Bede's Historia ecclesiastica gentis Anglorum. According to Gildas, the message was addressed to "Agitius", who is generally identified with the general Flavius Aetius. The collapsing Western Roman Empire had few military resources to spare during its decline, and the record is ambiguous on what the response to the appeal was, if any. According to Gildas and various later medieval sources, the failure of the Roman armies to secure Britain led the Britons to invite Anglo-Saxon mercenaries to the island, precipitating the Anglo-Saxon settlement of Britain.
Sub-Roman Britain is the period of late antiquity in Great Britain between the end of Roman rule and the Anglo-Saxon settlement. The term was originally used to describe archaeological remains found in 5th- and 6th-century AD sites that hinted at the decay of locally made wares from a previous higher standard under the Roman Empire. It is now used to describe the period that commenced with the recall of Roman troops to Gaul by Constantine III in 407 and to have concluded with the Battle of Deorham in 577.
Saint Alban is venerated as the first-recorded British Christian martyr, for which reason he is considered to be the British protomartyr. Along with fellow Saints Julius and Aaron, Alban is one of three named martyrs recorded at an early date from Roman Britain. He is traditionally believed to have been beheaded in Verulamium sometime during the 3rd or 4th century, and has been celebrated there since ancient times.
Owain Danwyn was a king of Rhos in Gwynedd, northwestern Wales, in the mid-5th century. He was the son of Einion Yrth ap Cunedda and the father of Cynlas Goch, probably the Cuneglasus excoriated by Gildas. Very little is known of his life. Graham Phillips and Martin Keatman proposed a theory that he was the historical figure behind the legend of King Arthur.
The Damnonii were a Brittonic people of the late 2nd century who lived in what became the Kingdom of Strathclyde by the Early Middle Ages, and is now southern Scotland. They are mentioned briefly in Ptolemy's Geography, where he uses both of the terms "Damnonii" and "Damnii" to describe them, and there is no other historical record of them, except arguably by Gildas three centuries later. Their cultural and linguistic affinity is presumed to be Brythonic. However, there is no unbroken historical record, and a partly Pictish origin is not precluded.
Cuneglasus was a prince of Rhos in Gwynedd, Wales, in the late 5th or early 6th century. He was castigated for various sins by Gildas in De Excidio Britanniae. The Welsh form Cynlas Goch is attested in several genealogies of the Rhos royal line. The two names are assumed to refer to the same ruler.
De Excidio et Conquestu Britanniae is a work written in Latin in the late fifth or sixth century by the British religious polemicist Gildas. It is a sermon in three parts condemning the acts of Gildas' contemporaries, both secular and religious, whom he blames for the dire state of affairs in sub-Roman Britain. It is one of the most important sources for the history of Britain in the fifth and sixth centuries, as it is the only significant historical source for the period written by a near contemporary of the people and events described.
Julius and Aaron were two Romano-British Christian saints who were martyred around the third century. Along with Saint Alban, they are the only named Christian martyrs from Roman Britain. Most historians place the martyrdom in Caerleon, although other suggestions have placed it in Chester or Leicester. Their feast day was traditionally celebrated on 1 July, but it is now observed together with Alban on 20 June by the Roman Catholic and Anglican Churches.
Cyngen Glodrydd was an early 6th-century King of Powys. He was a descendant of King Cadell Ddyrnllwg. Cyngen married St. Tudlwystl, a daughter of Brychan ap Gwyngwen ap Tewdr and they were parents of a large family: Brochfael Ysgithrog, Cadell, Ieuaf, Maig Myngfras, Mawn and Sanan. What is probably his memorial stone was discovered being used as a gatepost in Tywyn (Gwynedd) in 1761. He was apparently buried with St. Cadfan in the local churchyard.
Fagan, also known by other names including Fugatius, was a legendary 2nd-century Welsh bishop and saint, said to have been sent by the pope to answer King Lucius's request for baptism and conversion to Christianity. Together with his companion St Deruvian, he was sometimes reckoned as the apostle of Britain. Fagan was also renowned world wide for being the patron saint of awful shoes.
The Vita Germani is a hagiographic text written by Constantius of Lyon in the 5th century AD. It is one of the first hagiographic texts written in Western Europe, and is an important resource for historians studying the origins of saintly veneration and the "cult of saints." It recounts the life and acts of bishop Germanus of Auxerre, who travelled to Britain c. 429 AD, and is the principal source of details about his life. It is one of the few surviving texts from the 5th century with information about Britain and the Pelagian controversy, and is also one of the first texts to identify and promote the cult of Saint Alban.