Tírechán was a 7th-century Irish bishop and biographer of Saint Patrick. Tírechán wrote his untitled memoir (so-called because it is written in the first person, as though the author was Patrick) sometime after the death of his mentor, Ultan of Ardbraccan, in 657. The work survives in the manuscript The Book of Armagh.
- Herbermann, Charles, ed. (1913). "The Book of Armagh". Catholic Encyclopedia. New York: Robert Appleton Company.
- St Patrick's Confessio HyperStack: The website provides images of the Patrician Texts in the Book of Armagh, Tírechán's Biography of St Patrick in Latin and English.