Clogher is called by Ptolemy Rhigia or Regia; and according to some authors, St. Patrick founded and presided over a monastery here, which he resigned to St. Kertenn when he went to Armagh, to establish his famous abbey there; but according to others, it was built at the command of St. Patrick in the street before the royal palace of Ergal, by St. Macartin, who died in 506,