I can barely write in a straight line when I use ruled paper!
The date is also interesting - 6th Century.
Rome was sacked in 410 AD.
It’s probably early Byzantium aka Eastern roman empire since they lasted pretty long. Rome propper fell and hadrian’s wall was abandoned in the 400s period. My information comes from casual reading over the years so it could be unreliable.
The Roman Empire had been divided by Diocletian, and that came in and out of practice (sometimes two empires, sometimes one), until the city of Rome itself was sacked and occupied by barbarians. Eastern emperor Justinian made an attempt to reconquer the lost provinces during the 6th century. The eastern empire, usually called Byzantine, didn't fall until after the sacking of Constantinople by the Turks in 1453.
Undoubtedly written by someone affiliated with the Church, a monk, or some lay person.