Imperial Birth and Forced Monasticism
Ignatius was born around 797–798 with the secular name Niketas, the son of Michael I Rangabe (emperor 811–813) and Empress Prokopia, and grandson of Emperor Nikephoros I. As a child of the reigning house he received a nominal appointment as commander of the Hikanatoi, an imperial guard corps.
In 813 Leo V the Armenian deposed Michael I. The new emperor had the fifteen-year-old Niketas castrated — rendering him ineligible for the imperial succession — and imprisoned him in a monastery. According to his vita, monastic life strengthened him in faith and piety. He took the name Ignatius, rose to become abbot of his monastery, and established three monasteries on the Princes' Islands in the Sea of Marmara. He was ordained by Basil, Bishop of Paros.