|Usurper within the Gallic Empire|
|Reign||approximately late February to early June 269 (against Postumus)|
|Full name||Ulpius Cornelius Laelianus|
|Successor||Marcus Aurelius Marius|
Ulpius Cornelius Laelianus (also incorrectly referred to as Lollianus and Aelianus) was a usurper against Postumus, the emperor of the Gallic Empire. His revolt lasted from approximately late February to early June 269.
Little is known about Laelianus. He shares the same nomen as a prominent Spanish noble family, the Ulpii, that included Trajan among its members, and may have been a relative. This is supported by the strong allusion to Hispania on an aureus he struck, which featured the design of Hispania reclining with a rabbit to her side. If he indeed was a relative, this may be the reason Spain allied itself with Claudius II, after the death of Postumus, seemingly without a struggle.
Laelianus declared himself emperor at Moguntiacum in February/March 269. after repulsing a Germanic invasion. Although his exact position is unknown, he is believed to have been a senior officer under Postumus, either the legatus of Germania Superior or the commander of Legio XXII Primigenia. Laelianus represented a strong danger to Postumus because of the two legions he commanded (Primigenia in Mainz and VIII Augusta in Strasbourg); Despite this, his rebellion lasted only about two months before he was executed, reputedly by his own soldiers, or by Postumus' troops after a siege of Laelianus' capital. The siege of Mainz was also fatal for Postumus; it is said he was slain when he refused to allow his troops to plunder the city following its capture.
- Aurelius Victor, Liber de Caesaribus
- Eutropius, Brevarium, Book 9
- Historia Augusta, The Thirty Tyrants
- Southern, Pat. The Roman Empire from Severus to Constantine, Routledge, 2001
- Potter, David Stone, The Roman Empire at Bay, AD 180-395, Routledge, 2004
- Jones, A.H.M., Martindale, J.R. The Prosopography of the Later Roman Empire, Vol. I: AD260-395, Cambridge University Press, 1971
- Canduci, Alexander (2010), Triumph & Tragedy: The Rise and Fall of Rome's Immortal Emperors, Pier 9, ISBN 978-1-74196-598-8
- http://www.roman-emperors.org/laelianu.htm Polfer, Michel, "Laelianus (A.D. 269)", De Imperatoribus Romanis] (1999)
- Martindale, pg. 492
- Polfer, Laelianus
- Polfer, Laelianus; Potter, pg. 265
- Canduci, pg. 91; Polfer, Laelianus
- Potter, pg. 265
- Canduci, pg. 91
- Polfer, Laelianus; Canduci, pg. 91
- Southern, pg. 118
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