\"Celtic\" military technology and the Romans

[Urselius]

The Byzantines used doubled mail camails, and some 12th century illustrations seem to show lamellar worn over mail.

Also, from an earlier post on this site concerning a description of cataphract armour:

Ammianus Book 16 ch. 10 -8

"thoracum muniti tegminibus et limbis ferreis cincti" is usually translated as "protection of iron breast-plates, and girdled with belts of iron". However, limbis is not a usual word for 'belt' in Latin, and literally means "piping" or "border/edge". Could be the description of some sort of combination armour for the torso.