From England, France, Belgium and the Netherlands:
From Manuscript Miniatures. Some of these have deliberately exotic elements because of a setting that is supposed to be classical, mythical, historical, Asian, or more than one of the above. They should generally be pretty obvious.
From Effigies & Brasses. Bear in mind that these are biased towards people who could afford effigies or brasses, a wealthier subset of the people who could afford full armor.
From Armour in Art