Catholic Encyclopedia (1913)/St. Tassach
Irish saint, born in the first decade of the fifth century; died about 497. He was one of St. Patrick's artificers. When St. Patrick founded the Church of Raholp he placed St. Tassach over it as a couple of miles northeast of Saul, County Down, ultimately merged into the Diocese of Down. Tassach's rule is for ever memorable for the fact that he was selected by the national Apostle to be with him in his last moments and to administer the Holy Viaticum to him. This event is thus chronicled in "The Martyrology of Donegall"; "Tassach of Raholp gave the Body of Christ to Saint Patrick before his death in the monastery of Saul". His feast is on 14 April.
W. H. Grattan-Flood.