1829 Conclave
elected Pius VIII24 February – 31 March 1829 · The long nineteenth century · Quirinal Palace, Papal States
A papal conclave was held from 24 February to 31 March 1829 to elect a new pope to succeed Leo XII, who had died on 10 February. Of the 50 members of the College of Cardinals, all but eight attended.
Elected pope
Pius VIII
Francesco Castiglioni
Succeeded
Leo XII
Duration
36 days
Cardinal electors
50
locked in under conclave rules
Key officials
| Dean | Giulio Maria della Somaglia |
| Camerlengo | Pietro Francesco Galleffi |
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.