Marcus Didius Julianus was Roman emperor from March to June 193, during the Year of the Five Emperors. He is known for having purchased the title of emperor in an auction run by the Praetorian Guard. His reign is a common delineation in the decline and fall of the Roman Empire. Born: 133 Died: May 31, 193 In office: March 27, 193 – May 31, 193 Wiki link