Split within the Catholic Church from 1378 to 1417, in which bishops in Rome and Avignon both claimed to be the pope, joined by a third line of Pisan popes in 1409

Universities, academics and the Great Schism / R.N. Swanson.

The conciliarist tradition  constitutionalism in the Catholic Church, 1300-1870 / Francis Oakley.

The Celestine monks of France, c.1350-1450 : observant reform in an age of schism, council and war / Robert L.J. Shaw.

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Schism, The Great Western, 1378-1417

Works from the collections

Universities, academics and the Great Schism / R.N. Swanson.

The conciliarist tradition constitutionalism in the Catholic Church, 1300-1870 / Francis Oakley.

The Celestine monks of France, c.1350-1450 : observant reform in an age of schism, council and war / Robert L.J. Shaw.