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"222" refers to the year 222 in the Julian Calendar, which was a calendar system used in the Roman Empire and later adopted throughout much of the world. While this particular year may not be widely remembered for major historical events, understanding historical year systems like the Julian Calendar is important for accurately dating and studying events from ancient and medieval history.
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Emperor Alexander Severus
Year 222 (CCXXII) was a common year starting on Tuesday of the Julian calendar. In the Roman Empire, it was known as the Year of the Consulship of Antoninus and Severus (or, less frequently, year 975 Ab urbe condita). The denomination 222 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.