sentences:  Sometime in the 650s, he was sent to Ardbraccan in County Meath as a “fosterling” and student of Ultan, bishop of Ardbraccan.References to numerous geographical areas and to sites such as holy wells, cemeteries, crosses, and churches have led O’Hagan to call Tírechán one of the most “widely travelled” of early medieval writers.Tírechán is best known for “Collections,” writings about St. Patrick which have been preserved in the Book of Armagh.