Year 273 (CCLXXIII) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Tacitus and Placidianus (or, less frequently, year 1026 Ab urbe condita). The denomination 273 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.^[1] The year also saw most lost territories to rebellion returned to the Roman Empire by Emperor Aurelian.^[2]

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• June 1 – Reverianus, Christian bishop
• Callinicus, Greek historian and sophist
• Cassius Longinus, Greek philosopher
• Dexippus, Greek general and historian
• Hormizd I, king of the Sassanid Empire
• Septimius Antiochus, Roman usurper
• Wei Zhao, Chinese historian and scholar (b. 204)