Sale of the Empire to Didius Julianus
- Section from Edward Gibbon's "Decline and Fall of the Roman Empire," explains how the Roman Emperor bought the Roman Empire at auction.
- http://www.worldwideschool.org/library/books/hst/roman/TheDeclineandFallofTheRomanEmpire-1/chap12.html

Julianus
- Overview of the life and reign of this Roman Emperor.
- http://www.roman-empire.net/decline/julianus.html

How Didius Julianus Bought the Empire at Auction, 193 CE
- Account by Herodian of Syria of how Didius Julianus acquired the Roman throne.
- http://www.fordham.edu/halsall/ancient/herodianus-didius.html

Didius Julianus
- Encyclopedia article about the life of this Roman Emperor from Wikipedia.
- http://en.wikipedia.org/wiki/Didius_Julianus