The fellow-martyr of Saint Clement, bishop of Ancyra. His relics, with those of Saint Clement, lay in a church in the suburbs of Constantinople, now called Pera; but were brought into the West, when that city was taken by the Latins.
- Father Alban Butler. “Saint Agathangelus, Martyr”. , 1866. CatholicSaints.Info. 22 January 2013. Web. 6 December 2016. <>