Jus novum (c. 1140-1563) Jus novissimum (c. 1563-1918) Jus codicis (1918-present) Other Sacraments Sacramentals Sacred places Sacred times Supra-diocesan/eparchal structures Particular churches Juridic persons Philosophy, theology, and fundamental theory of Catholic canon law Clerics Office Juridic and physical persons Associations of the faithful Pars dynamica (trial procedure) Canonization Election of the Roman Pontiff Academic degrees Journals and Professional Societies Faculties of canon law Canonists Institute of consecrated life Society of apostolic life Ubi periculum is a papal bull promulgated by Pope Gregory X during the Second Council of Lyon on 7 July 1274 that established the papal conclave format as the method for selecting a pope,[1] specifically the confinement and isolation of the cardinals in conditions designed to speed them to reach a broad consensus.
Its title, as is traditional for such documents, is taken from the opening words of the original Latin text, Ubi periculum maius intenditur, 'Where greater danger lies'.
The imposition of monastic-style modes of living inside the conclave may also have been intended to lift the minds of the electors out of the everyday business of governing the church, and focus their attention on the spiritual importance of their activity.
[8] At the most recent, lengthy election in Viterbo, the local authorities had not held the cardinals incommunicado, but had restricted their movements and controlled their access to food.
[15] His successor John XXI revoked Ubi periculum on 20 September 1276, announced he would issue a substitute set of regulations, but failed to do so before his death in May 1277.