The Roman Lorica Segmentata Armor - Newstead type, it is reconstructed from iron plates with brass fittings. It’s a type of personal armour that was used by soldiers of the Roman Empire, consisting of metal strips fashioned into circular bands, fastened to internal leather straps. The lorica segmentata has come to be viewed as iconic of the Roman legions in popular culture. The tendency to portray Roman legionaries clad in this type of armour often extends to periods of time that are too early or too late in history.
Source:
https://en.wikipedia.org/wiki/Lorica_segmentata
https://forums.taleworlds.com/index.php?threads/lorica-segmentata-research.340082/
http://www.legionxxiv.org/newsteadenlrg/
https://equipment.fandom.com/wiki/Lorica_Segmentata_(Newstead_Type)