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| Atlas of the Greek and Roman World | University of North Carolina. |
| De Imperatoribus Romanis: An Online Encyclopedia of Roman Emperors | Salve Regina University. Includes an index of all the emperors who ruled during the empire's 1500 years, biographical essays on the individual emperors, family trees of important imperial dynasties, an index of significant battles in the empire's history, capsule descriptions and maps of these battles, and maps of the empire at different times. |
| Encyclopedia Britannica | |
| Encyclopedia Mythica | M.F. Lindemans. Folklore, mythology, and legend. |
Encyclopaedia Romana
| James Grout. Articles on Roman architecture, history, culture, and provinces. References. |
| Johns Hopkins Guide to Literary Theory and Criticism | Individuals, Schools, Movements, Theorists & Critics |