Dion Cassius (Cassius Dion)

Dion Cassius, also known as Cassius Dion, was a Roman historian of Greek language, active during the Severan period (2nd and 3rd centuries AD). He held several high-ranking magistratures, including the ordinary consulship of 229 alongside Emperor Severus Alexander. His detailed and precise testimony on Roman history, especially on the evolution of its institutions, makes him a crucial source for ancient history.