Journalists look at a photograph of the conclave where late Pope Francis was elected on March 13, 2013, and displayed inside the Borgia Apartments at the Vatican Museums during a press tour, Friday, May 2, 2025. (AP Photo/Francisco Seco)
Pilgrims arrive to visit St. Peter’s Basilica on the seventh of nine days of mourning for late Pope Francis, at the Vatican, Friday, May 2, 2025. (AP Photo/Francisco Seco)
Vatican workers install Sistine Chapel stove where ballots are burned during conclave to elect pope
VATICAN CITY (AP) — Vatican workers have installed the simple stove in the Sistine Chapel where ballots will be burned during the upcoming conclave to elect a new pope.
Journalists look at a photograph of the conclave where late Pope Francis was elected on March 13, 2013, and displayed inside the Borgia Apartments at the Vatican Museums during a press tour, Friday, May 2, 2025. (AP Photo/Francisco Seco)
VATICAN CITY (AP) — Vatican workers have installed the simple stove in the Sistine Chapel where ballots will be burned during the upcoming conclave to elect a new pope.
The Holy See released a video Saturday of the preparations for the May 7 conclave, which included installing the stove and a false floor in the frescoed Sistine Chapel to make it even. The footage also showed workers lining up simple wooden tables where the cardinals will sit and cast their votes on Wednesday, and a ramp leading to the main seating area for any cardinal in a wheelchair.
On Friday, fire crews were attaching the chimney from which smoke signals will indicate whether a pope has been elected.
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The preparations are all leading up to the solemn pageantry of the start of the conclave to elect a successor to , history’s first Latin American pope, who died April 21 at age 88.
Wednesday morning begins with a Mass in St. Peter’s Basilica celebrated by the dean of the College of Cardinals, Cardinal Giovanni Battista Re, after which the cardinal electors are sequestered from the rest of the world. In the afternoon, they will process into the Sistine Chapel, hear a meditation and take their oaths before casting their first ballots.
As of now, 133 cardinals are expected to take part in the conclave. If no candidate reaches the necessary two-thirds majority, or 89 votes, on the first ballot, the papers will be burned and black smoke will indicate to the world that no pope was elected.
The cardinals will go back to their Vatican residence for the night and return to the Sistine Chapel on Thursday morning to conduct two votes in the morning, two in the afternoon, until a winner is found.
After every two rounds of voting, the ballots are burned in the stove. If no pope is chosen, the ballots are mixed with cartridges containing potassium perchlorate, anthracene — a component of coal tar — and sulfur to produce black smoke out the chimney. If there is a winner, the ballots are mixed with potassium chlorate, lactose and chloroform resin to produce the white smoke.
The white smoke came out of the chimney on the fifth ballot on March 13, 2013, and Cardinal Jorge Mario Bergoglio was introduced to the world as Pope Francis a short time later from the loggia of St. Peter’s Basilica.
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The preparations are underway as the cardinals meet privately in to discuss the needs of the Catholic Church going forward and the type of pope who can lead it.
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