St. Cianán (died 24 November 489) was a Bishop of Duleek in Ireland. He was descended from the royal blood of the kings of Munster.


According to his acts quoted by Usher, he was a pupil of the religious man, Nathan; and, when a youth, was one of the fifty hostages whom the princes of Ireland gave to king Leogair, by whom he was set free at the intercession of Bishop Kiaran. He then went into France, and passed some time at Tours in the monastery of St. Martin.

Returning to his native country, he converted great numbers to Christianity in Connaught. Then he went to Leinster, and founded a church in a place called to this day The Wood of Cianán. At length he went into the territory of Owen, (that is, Tir-oen,) so called from King Owen, whose niece, Ethne, was Cianán's mother. There he broke down an idol with an altar that was dedicated to it, and on the place built a Christian church. In the office of St. Cianán extant in manuscript in the library at Cambridge, it is said that the saint built here a church of stone, on that account called Damliag, corrupted into Duleek.

Duleek having suffered greatly by several fires and devastations of the Danes, its episcopal see was united to the diocese of Meath.


  • Usher, Antiq. 1. 29, and Primord. p. 1070;
  • Ind. Chron. ad ann. 450;
  • Ware's bishops, p. 137, and on St. Ultas, 4 Sept. p. 39.

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