Valerian and Gallienus
- Information on the lives and reigns of the father-son of Roman Emperors from the 3rd Century.
- http://www.roman-emperors.org/gallval.htm

Publius Licinius Egnatius Gallienus
- Overview of the life and reign of the Emperor Gallienus.
- http://www.roman-empire.net/decline/gallienus.html

History of the Goths Chap. 20:  The Devastation of the Goths in the Reign of Gallienus, 260-268 CE
- Account by Jordanes of the effectiveness of the Roman Emperor Gallienus's campaign against the Goths in the 3rd Century.
- http://www.fordham.edu/halsall/ancient/jordanes-goths20.html

Gallienus
- Wikipedia article on the life of the Roman Emperor Gallienus.
- http://en.wikipedia.org/wiki/Gallienus