St. Clement Of Ancyra
Source: The Lives of the Fathers, Martyrs, and Saints by Alban Butler
Roman martyrology: At Ancyra, in Galatia, St. Clement, bishop. After having frequently endured torments, he finally completed his martyrdom under Diocletian.
St. Clement suffered under Dioclesian, and is ranked by the Greeks among the great martyrs. His modern Greek acts say, his lingering martyrdom was continued by divers torments during twenty-eight years; but are demonstrated by Baronius and others to be of no authority. Two churches at Constantinople were dedicated to God under the invocation of St. Clement of Ancyra; one called of the Palace, the other now in Pera, a suburb of that city. Several parts of his relics were kept with great devotion at Constantinople.
His skull, which was brought thence to Paris when Constantinople was taken by the Latins, in the thirteenth century, was given by queen Anne of Austria to the abbey of Val de Grace.