The most commonly seen armour in the mass graves is the coat of plates. These consist of an outer shell or fabric or leather (the former likely being far more common at the time), with a number of iron or steel pallets attached to the inside. It would eventually become a more closely fitted garment with mostly smaller but more numerous plates, turning into the brigandine. In either case the shell was likely of negligible protective value, but rather just there to keep the plates in place.
A local craftsman has made reproductions of every single one found, and a few of them were on display. This one was left out for people to try on.