Gold plated Roman helmet found near Sirmium, Serbia (4th Century AD). it is thought to have belonged to a Cavalry Officer of the Emperor Licinius (Museum of Vojvodina, Novi Sad, Serbia) [800×924]

On the helmet it's written:

ΔΙΖΖωΝ ΥΓΙεΝωΝ ΦΟΡΙ

ΑΥΕΙΤΟΥ ΕΡΓΟΝ ΓοΚ Α Γρ ΙΒ

Dizzon, wear this in good health, from Avitus