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Pope Sylvester I and Emperor Constantine the Great
Year 328 (CCCXXVIII) was a leap year starting on Monday of the Julian calendar. At the time, it was known as the Year of the Consulship of Ianuarinus and Iustus (or, less frequently, year 1081 Ab urbe condita). The denomination 328 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.