07-22-2016, 09:12 PM
The Romans did not use capitalization at all - because small letters did not yet exist.
The latin alphabet (entirely majuscule) was fully formed within the Roman empire by the 2nd century BC. During the height of the Roman Empire there were two distinct styles - 1. capitalis monumentalis (all caps - pretty much identical to the font, Times New Roman) and 2. capitalis rustica - a narrower, more casual style.
Minuscules (small letters) developed from Irish half-uncial (see Book of Kells) about 600-700 AD, and weren't fully formed with ascenders, descenders and capitalization until the mid-800's AD with the Carolingian minuscule embraced by Charlemagne (actually, it was his education czar Alcuin of York).
Capitalis Monumentalis - Inscription from the Trajan Column, 113 AD