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49 AD (XLIX) was an ordinary year starting on the Wednesday of the Julian calendar.
At the time, it was known as the Year of the Consulship of Longus and Veranius (or, less frequently, the year 802 Ab urbe condita).
The 49 AD designation for this year has been used since the early medieval period, when the calendar era of Anno Domini became the prevailing method in Europe for naming years.