
Emperor Justinian
Roman historian Procopius had a lot to complain about in his Secret History. Its pretty easy to say that he did a hatchet job on his bosses, Emperor Justinian and General Belisauris. Procopius was the Late Antique equivalent of a severely conservative ‘think tank’ founder, you know the type that queue up to appear on talk shows and start whisper campaigns. He shared some whoppers, perhaps the least of which is theorizing that his emperor is really a demon and the court women were even worse.
Complaints about Justinian’s use of the treasury are constant throughout the Secret History.
There was no time at which he ceased giving huge gifts of money to all the barbarians, to both easterners and westerners as well as out of the North and to the South, as far as the inhabitants of Britain … for they poured into Byzantion from every corner of the world in order to reach him….he was overjoyed with this state of affairs, believing it to be a lucky opportunity to exhaust the wealth of the Romans and throw it out to the barbarians, as good as throwing it into the churning waves of the sea. (Procopius, Secret History, III:13-15)
If Justinian’s ambition to recapture former imperial territory was real, then he had to build hegemony, buying allies and perhaps paying for proxy wars. He also had to keep former Roman territory that paid him at least lip service happy. So if British kings styled themselves protectors of the Roman province and requested subsidies to pay Saxon troops to protect Roman territory, it would be hard to Justinian to turn them down while handing out money to barbarians. Regardless of how they asked, there was enough gold going from Constantinople to Britain for Procopius to know about it and complain.

Justinian I Tremisis. minted in Rome. Struck circa 540-546 AD.
If a lot of gold was heading to Britain, it probably went to the western territories along the Irish sea where archaeologists have found most of the Roman/Byzantine trade goods in the fifth century. Most notably, the Penmachno stone from Gwynedd dates the grave of the son of Avitorius who was buried to the time of Justi* Con[sul]. This stone has been most often dated to the consulship of Justinian in 540 (Sarris, p. 200). Gildas’ five kings are likely to be among the beneficiaries of Justinian’s largess, and he singles out Maelgwn of Gwynedd as the most powerful. So it is interesting that the one king we would predict would have been in touch with Justinian’s court, has the Penmachno stone in his kingdom and is the only British citizen recorded as dying in the ‘great mortality’ in 547. The Annals Cambriae are usually off by a couple of years in this section so this lines up well with the Irish records of plague in the 540s.
The great death [plague] in which Maelgwn, king of Gwynedd died. ‡Thus they say ‘The long sleep of Maelgwn in the court of Rhos’. Then was the yellow plague.‡ (Annals Cambriae, 547)
anus Mortalitas magna inqua pausat mailcun rex genedotae (A-text of Annals Cambriae, Gough-Cooper ed.)
Likewise the additional material added in the B-text (‡) referring to Maelgwn’s death during the ‘yellow plague’ has the hallmarks of oral history found in Irish sources. (I’ll come back to folklore on Maelgwn and his death some other day.) For unknown reasons, Irish folklore color codes the plague as yellow – although no epidemic infectious disease of the mid-sixth century causes yellowing. Ann Dooley has made a well argued case for the ‘yellow plague’ and other terms like blefed as being references to the plague. So we have a route and rationale for the Plague of Justinian to reach the Irish Sea zone from any number of points with direct contact infected areas of Justinian’s territory. While its possible that Justinian’s goods reached Britain through Gaul (possibly through the Loire valley) (Little 2007:10), while Justinian held territory in Iberia and controlled the Straits of Gibraltar, a direct route by sea is also possible. Plague fleas can be transported in cereals or textiles for long distances.
One of the oddities of early Anglo-Saxon records is that most of the royal dynasties go back to about 550, about a hundred years after the Anglo-Saxons themselves claim (and archaeology confirms) that they came to Britain. Failure to pay for security services rendered is also a consistent feature in folklore of the ‘adventus’. Archaeology also tells us that links to Byzantium were lost from the mid-sixth century, right around the time of the plague. So whatever help Justinian was sending Britain, it may have been to keep the ‘Saxons’ on the payroll for a little while longer, but as soon as trade with Byzantium (and presumably Roman foreign aid) is cut off around the time of the plague, we find the origins of the English royal dynasties.
So when I look at the recent Staffordshire hoard of gold military equipment, I just have to wonder how much of Justinian’s gold is recycled there.

Items from the Staffordshire hoard
Reference:
Anthony Kaldellis, ed. & trans. Prokopios: The Secret History and Related Texts. Indianapolis/Cambridge: Hackett, 2010.
Ann Dooley “The Plague and its Consequences in Ireland” in Plague and the End of Antiquity, ed. Lester Little, Cambridge, 2006.
Peter Sarris. Empires of Faith: The Fall of Rome to the Rise of Islam, 500-700. Oxford History of Medieval Europe, 2011. [Sarris is the only recent historian to discuss these linkages between Justinian and events in Britain, but he does not mention Maelgwn’s death.]
Lester Little “Life and Afterlife of the First Plague Pandemic” in Plague and the End of Antiquity: The Pandemic of 541-750. Lester Little, ed. Cambridge, 2006.