173

Year 173 (CLXXIII) was a common year starting on Thursday of the Julian calendar. 

 Events 
 By place 
 Roman Empire 
 Gnaeus Claudius Severus and Tiberius Claudius Pompeianus become Roman Consuls. 
 June 11 – Emperor Marcus Aurelius begins a battle against the Quadi.
 Avidius Cassius, the governor of Syria, stops shepherds known as the boukoloi.

 Births 
 Maximinus Thrax, Roman emperor  (d. 238)
 Mi Heng  (d. 200)
 Sun Ben, nephew of Sun Jian  (d. 209)
 Yuan Tan, eldest son of Yuan Shao  (d. 205)

 Deaths