1823 Conclave
elected Leo XII2–28 September 1823 · The long nineteenth century · Quirinal Palace, Papal States
A papal conclave was held from 2 to 28 September 1823 to elect a new pope to succeed Pius VII, who had died on 20 August. Of the 49 members of the College of Cardinals, all but four attended.
Elected pope
Leo XII
Annibale della Genga
Succeeded
Pius VII
Duration
27 days
Cardinal electors
49
locked in under conclave rules
Key officials
| Dean | Giulio Maria della Somaglia |
| Camerlengo | Bartolomeo Pacca |
Ballot-by-ballot tallies are destroyed by design — the paper is burned in the stove whose smoke announces the result — so this entry records what the Church documents: the dates, the electors, the number of ballots where known, and the man who walked out onto the balcony.