This category lists sites and pages devoted to the art of the Ancient world, from the dawn of civilization to the fall of the Western Roman Empire in 476 CE (including the "Antique" or "Classical" periods of Europe). The art of ancient Rome, Egypt, Greece and Macedonia (including Minos and Mycenae), Mesopotamia (including Sumeria, Babylonia, and Assyria), and Persia (including Media, Pathia, and Sassania) are included here.
Ars Mar Film describes the art of the Christian catacombs of Rome, which include frescoes, sculptures and inscriptions. http://www.arsmar.com/ce_art.htm
Though the author says this list is neither comprehensive nor up to date - it is a good start to books covering the Etruscan and Roman art periods. http://harpy.uccs.edu/roman/html/romebib.html