Bầu cử giáo hoàng năm 1261

The 1261 papal election (26 May – 29 August) took place after the death of Pope Alexander IV on 25 May and chose Pope Urban IV as his successor. Since Pope Alexander had been resident in Viterbo since the first week of May 1261, the meeting of the cardinals to elect his successor took place in the Episcopal Palace at Viterbo, which was next to the Cathedral of S. Lorenzo. The actual date of the beginning of the Electoral Meeting (there were, as yet, no Conclaves) is unknown. If the canon of Pope Boniface III (A.D. 607) were still in effect (and there is no reason to think that it was not), then the Election could not begin until the third day after the Pope's burial.