Vitellius, Roman emperor (died 69)

AD 15 (XV) was a common year starting on Tuesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Caesar and Flaccus. The denomination AD 15 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Aulus Vitellius was Roman emperor for eight months, from 19 April to 20 December AD 69. Vitellius became emperor following the quick succession of the previous emperors Galba and Otho, in a year of civil war known as the Year of the Four Emperors. Vitellius added the honorific Germanicus to his name instead of Caesar upon his accession. Like his predecessor, Otho, Vitellius attempted to rally public support to his cause by honoring and imitating Nero who remained popular in the empire.

September 24 is the 267th day of the year in the Gregorian calendar; 98 days remain until the end of the year.