Gregorian Reform
The synod was attended by no fewer than fifty bishops, three hundred priests and three thousand laymen, including King Murtough O'Brien. There were no representatives of the provinces of Connaught and Leinster, in which the Reform movement had not yet established itself. The synod's deliberations were prompted by the Gregorian Reform and guided by the relatively new powers of the Papacy as defined in "Dictatus papae" (1075–87) and "Libertas ecclesiae" (1079).