During the early Renaissance, roman and italic type were used separately. Today, roman and italic type are mixed, and most typefaces are composed of an upright roman style with an associated italic or oblique style.
The name roman is customarily applied uncapitalized distinguishing early Italian typefaces of the Renaissance period and most subsequent upright types based on them, in contrast to Roman letters dating from classical antiquity.
Nesbitt, Alexander The History and Technique of Lettering (1957), Dover Publications, Inc.ISBN 0-486-40281-9. The Dover edition is an abridged and corrected republication of the work originally published in 1950 by Prentice-Hall, Inc. under the title Lettering: The History and Technique of Lettering as Design