Any discussion of the conciliar assemblies and decisions of the Church is likely to consider things from the centre—to enumerate those present, to distinguish the issues, arguments, and protagonists, and to emphasize the final decisions. Perhaps, indeed, to over-emphasize them, for there is a tendency to assume that what was decreed at Rome was rapidly implemented in the provinces. Often, of course, this was the case, and the speed with which the decisions of the Third Lateran Council were disseminated is striking testimony to the ability of the twelfth-century Papacy to publicize its policies. The Papacy developed rapidly, however, in the middle years of the twelfth century, and it is dangerous to assume that what was true of the pontificate of Alexander III can also be applied to that of Innocent II. It may therefore be useful to look closely at a major provincial dispute from the first half of the twelfth century, and to attempt to determine how decisively regional practice was affected by papal decrees in one particular instance.

The death of Archbishop Thurstan of York on 6 February 1140 marks an epoch in the history of the northern province. Homo magnarum rerum et totius religionis amator, as the historian of Fountains styles him, Thurstan was the last and greatest in the line of able Norman prelates who had rebuilt the Church, under all its aspects, in the North of England.