Cassian of Tangier was a 3rd-century Christian martyr who lived in the Roman province of North Africa. Serving as a court recorder during the trial of Marcellus the Centurion, he witnessed the death sentence handed down by the deputy prefect, Aurelius Agricola. In a moment of protest against the perceived injustice of the ruling, Cassian discarded his writing tools and spoke out. This act of defiance led to his immediate arrest and subsequent execution by beheading on December 3, 298, during the reign of Diocletian.