Lorcán Ua Tuathail, known in English as Laurence O'Toole and in French as Laurent d'Eu (1128 – 14 November 1180), was Archbishop of Dublin at the time of the Norman invasion of Ireland. Lorcán played a prominent role in the Irish Church Reform Movement of the 12th century and mediated between the parties during and after the invasion. He was canonised in 1225 by Pope Honorius III. Early life Lorcán was born at Kilkea, County Kildare, Ireland, the youngest of four sons of King Muirchertach Ua Tuathail of the Uí Muiredaig, a branch of the Uí Dúnlainge dynasty. His mother was an O'Byrne princess of the Uí Fáelán branch of the Uí Dúnlainge. The Uí Tuathail (O'Toole) take their surname from their ancestor Tuathal mac Augaire, King of Leinster, who died in 958. They resided at Maistiu (Mullaghmast) in what is now County Kildare. However, by the time of his son's birth King Muirchertach was subordinate to the new over-kings from South Leinster, of the Uí Ceinnselaig. The king from 1126 was Diarmait Mac Murchada (Dermot MacMurrough). At the age of 10, Lorcán was sent to Diarmait as a hostage for his father. However, at one point Muirchertach's loyalty to Diarmait must have become suspect as Lorcán was imprisoned for some two years in extreme austerity and barely given enough to live on. Due to the intercession of the abbot of Glendalough – members of Lorcán's family had been buried at one of its churches for generations – relations were amicably restored between Diarmait and Muirchertach. One result of his confinement was the strengthening of Lorcán's wish to enter the religious life. The story goes that when Muirchertach arrived at Glendalough for Lorcán, he stated that he would draw lots to have one of his sons made a priest, at which Lorcán laughed as he had long thought of doing so. No lots were drawn, and Lorcán stayed at Glendalough. Abbot of Glendalough In time he rose to become Abbot of Glendalough at the age of 26 in 1154. Lorcán was a religious reformer. He wished that the Irish Church would reflect the Catholic Church and strengthen the bonds between the Irish Church and Rome. Through his own example Lorcán brought his spiritual renewal to the church in Ireland and married the best in the Gaelic monastic movement with the best in the Frankish-European liturgical monastic movement. Lorcán began a