Ancient Coin History
- General History
- David Sear Chronology of Greek Rulers
- Roman Coins List of Roman Emperors
- De Imperatoribus Romanis: An Online Encyclopedia of Roman Rulers and Their Families
- De Imperatoribus Romanis: Family Trees: Index of Imperial Stemmata, by Michael DiMaio, Jr.
- Coin Week Coins of the Twelve Caesars
- Coin Week 193 Year of the Five Emperors
- Coin Week Byzantine Coins: NGC Ancients – Collecting Byzantine Coins on a Budget
- Bekircan Tahberer
- General History
- Daniel Voshart: Roman Emperor Project: Digitally created facial images of Roman emperors
- The History of Rome podcast: Mike Duncan
- The History of Byzantium podcast: Robin Pierson
- Livius.org Articles on ancient history
- Usefulcharts.com
- Wikipedia Family Tree of Roman Emperors
- Understanding Byzantine Economy: The Collapse of a Medieval Powerhouse (TheCollector.com)
- TheCollector.com Ancient History