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Feastday: July 18

Death: 745

Nun and martyr. Born to a noble family, she was orphaned in her youth and eventually became a nun at Constantinople (modern Istanbul, Turkey) at the monastery of St. Anastasia. She led a group of nuns in defense of the icon of Christ which hung over the main door of the community when soldiers were sent to enforce the decrees of the Iconoclast emperors Leo Ill the Isaurian  and Constantine V. Theodosia and twelve other nuns were arrested and tortured; Theodosia died of her grievous injuries while in prison. It is possible that the account of Theodosia is fictitious, based perhaps on the story of the fourth-century martyrs Theodora and companions who are venerated on the same feast day.

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