Historical Context
The martyrdoms at Sebaste took place during the reign of Licinius, co-emperor of the Eastern Roman Empire, who intensified persecution of Christians in his domains in the years before his defeat by Constantine I. The Forty Martyrs of Sebaste — members of the Legio XII Fulminata — were condemned around 320 for refusing to sacrifice to pagan gods; they were exposed naked on a frozen lake and died of cold. Severian's connection to them places his martyrdom in this same historical moment and location.