He was created Cardinal by Pope Celestine II in 1143. He presided at the Synod of Kells in 1152, which decided the system of four archbishops (Armagh, Dublin, Cashel, and Tuam) for Ireland. He argued for a reduction in the number of bishops.
- John Paparo, Paparone.
- The Cardinals of the Holy Roman Church: Consistories for the creation of cardinals, 12th Century (1099-1198)
- The Dioceses of Ireland
- Warren - Church and state in Angevin Ireland
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