Cassian of Imola was a 4th-century Christian teacher and bishop who lived during a period of Roman persecution. Serving as a schoolmaster in Imola, he faced execution for refusing to participate in sacrifices to Roman deities under the orders of Emperor Julian the Apostate. His death is traditionally attributed to the vengeance of his own students, who used their writing tools to kill him. He is recognized as a saint within the Catholic, Anglican, and Orthodox traditions.