upright=1.35|thumb|The Exarchate of Ravenna (orange) in 584 __NOTOC__ Year 584 (DLXXXIV) was a leap year starting on Saturday of the Julian calendar. The denomination 584 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.
upright=135|thumb|The Exarchate of Ravenna (orange) in 584 __NOTOC__ Year 584 (DLXXXIV) was a leap year starting on Saturday of the Julian calendar. The denomination 584 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