A roofless palace in Italy's Viterbo hosted the first and longest conclave
- In November 1268, cardinals gathered in Viterbo, Italy to elect Pope Clement IV's successor in the longest papal election.
- The conclave lasted 1,006 days because strong divisions among cardinals and political factions delayed consensus until September 1271.
- Citizens, frustrated by funding the cardinals' stay, restricted their meals and exposed them by removing the roof of the palace’s main hall.
- A parchment dated June 8, 1270 records that the cardinals were locked inside a 'palazzo discoperto', meaning a palace without a roof.
- The election ended with Gregory X, who established strict conclave rules in Ubi Periculum that shaped future papal elections and shortened durations.
34 Articles
34 Articles

A roofless palace in Italy's Viterbo hosted the first and longest conclave
It was the mounting rage of citizens in Viterbo, a small town north of Rome, that ended the longest papal election in the Catholic Church’s history, forging for the first time the word “conclave.”
Records and Fun Facts about the Conclave
The first conclave: in 1241 the pope's election took place under difficult, warlike conditions. Because the cardinals were divided among themselves and could not agree, the influential Roman senator Matteo Rosso Orsini had the cardinals included. They then, after one of the present cardinals had already died, made the oldest one from among them Pope: Celestine IV. But he died, weakened by the conclave, after 17 days, before he could be crowned. …
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