[garciansmith]

The capital letters were indeed inspired by Roman monumental inscriptions. But all the lower case forms were taken from Carolingian designs. Humanists wanted to copy Roman forms to go back to what they saw as writing uncontaminated with medieval influence, but the texts of Roman authors they used to do so were not actually written by Romans but copied by Carolingian-era scribes. It's why its generally much easier for us to read ninth-century texts than, say, earlier (e.g., Merovingian chancery script, yikes) and later scribal hands (e.g., late medieval Gothic).