Rev. Alban Butler (171173). Volume I: January. The Lives of the Saints. 1866.
St. Agathangelus, Martyr
THE FELLOW-MARTYR of St. Clement, bishop of Ancyra. His relics, with those of St. 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.