Did the Romans have parade armour?

[Urselius]

I'm astonished no one has mentioned Constantius II parade in Rome in 354AD-

I would also like to mention that Ammianus describes in very good detail both Roman Clibanarii and Sasanid Cataphracts who wore metalic masks that only had nostril holes, the masks were a protection against bow fire.

I mentioned it earlier in the thread - in the context that it was within the city of Rome and soldiers wore armour and carried weapons.