Constitutions of the Second Council of Lyon
The decrees of the general council that Gregory X held at Lyon in 1274: a constitution on the crusade, a definition that the Holy Spirit proceeds from the Father and the Son as from one principle, and the rule that shuts the cardinals in conclave to elect a pope.
The council issued two sets of texts. The first, Zelus fidei, deals with the Holy Land and the crusade. The second is a collection of thirty-one constitutions that Gregory X promulgated on 1 November 1274; the editor’s introduction notes that three of them were added after the council and that others, the conclave rule among them, were revised by the papal curia before publication.
Constitution 1 of the second set, which opens with the words Fideli ac devota, is the dogmatic statement on the procession of the Holy Spirit. Constitution 2, Ubi periculum, is the conclave law; it says expressly that it leaves in force what Alexander III had laid down for papal elections (The Third Lateran Council). The introduction is modern scholarship and is cited in this wiki only for the editor’s account of the texts.
Cited in
- May 1274, firm date