Pope Francis meets with King Philippe and Queen Mathilde in the Castle of Laeken, Brussels, Friday, Sept. 27, 2024. (AP Photo/Andrew Medichini)

Pope Francis, center, signs the book of honor during his visit to King Philippe of Belgium, right, and Queen Mathilde at the Castle of Laeken, Belgium, Friday, Sept. 26, 2024, on the second day of a four-day apostolic journey to Luxembourg and Belgium. (Alberto Pizzoli/pool photo via AP)

Pope Francis, left, flanked by Rector Luc Sels, delivers his speech during his meeting with the professors in the Promotiezaal of the Catholic University of Leuven, Belgium, Friday, Sept. 27, 2024. (AP Photo/Andrew Medichini)

Pope Francis meets with King Philippe and Queen Mathilde in the Castle of Laeken, Brussels, Friday, Sept. 27, 2024. (AP Photo/Andrew Medichini)

Belgian Royal Escort wait for the arrival of Pope Francis on the occasion of his visit to King Philippe and Queen Mathilde in the Castle of Laeken, Brussels, Friday, Sept. 27, 2024. (AP Photo/Andrew Medichini)

Pope Francis delivers his message during a meeting with the authorities and the civil society in the Grande Galerie of the Castle of Laeken, Brussels, Friday, Sept. 27, 2024. (AP Photo/Andrew Medichini)

Pope Francis meets with King Philippe and Queen Mathilde in the Castle of Laeken, Brussels, Friday, Sept. 27, 2024. (AP Photo/Andrew Medichini)

Pope Francis flanked by King Philippe and Queen Mathilde delivers his message during a meeting with the authorities and the civil society in the Grande Galerie of the Castle of Laeken, Brussels, Friday, Sept. 27, 2024. (AP Photo/Andrew Medichini)

Rector Luc Sels delivers his speech during Pope Francis' meeting with the professors in the Promotiezaal of the Catholic University of Leuven, Belgium, Friday, Sept. 27, 2024. (AP Photo/Andrew Medichini)

Pope Francis touches the belly of a newly married woman during his weekly general audience in St. Peter's Square, at the Vatican, Wednesday, Sept. 25, 2024. (AP Photo/Gregorio Borgia)

Pope Francis, center, talks to King Philippe of Belgium, right, and Queen Mathilde at the Castle of Laeken, Belgium, Friday, Sept. 26, 2024, on the second day of a four-day apostolic journey to Luxembourg and Belgium. (Alberto Pizzoli/pool photo via AP)

Belgian Royal Escort wait for the arrival of Pope Francis on the occasion of his visit to King Philippe and Queen Mathilde in the Castle of Laeken, Brussels, Friday, Sept. 27, 2024. (AP Photo/Andrew Medichini)

Pope Francis meets with King Philippe and Queen Mathilde in the Castle of Laeken, Brussels, Friday, Sept. 27, 2024. (AP Photo/Andrew Medichini)

Pope Francis, center, signs the book of honor during his visit to King Philippe of Belgium, right, and Queen Mathilde at the Castle of Laeken, Belgium, Friday, Sept. 26, 2024, on the second day of a four-day apostolic journey to Luxembourg and Belgium. (Alberto Pizzoli/pool photo via AP)

Pope Francis, left, is welcomed by Rector Luc Sels as he arrives for a meeting with the professors in the Promotiezaal of the Catholic University of Leuven, Belgium, Friday, Sept. 27, 2024. (AP Photo/Andrew Medichini)

Pope Francis arrives on the occasion of his visit to King Philippe and Queen Mathilde in the Castle of Laeken, Brussels, Friday, Sept. 27, 2024. (AP Photo/Andrew Medichini)

Pope Francis delivers his message during a meeting with the authorities and the civil society in the Grande Galerie of the Castle of Laeken, Brussels, Friday, Sept. 27, 2024. (AP Photo/Andrew Medichini)

Pope Francis, center, talks to King Philippe of Belgium, right, and Queen Mathilde at the Castle of Laeken, Belgium, Friday, Sept. 26, 2024, on the second day of a four-day apostolic journey to Luxembourg and Belgium. (Alberto Pizzoli/pool photo via AP)

Pope Francis waves during a tours in an open car among the faithful in the Groet Markt in Leuven, Belgium, on the second day of his four-day visit to Luxembourg and Belgium, Friday, Sept. 27, 2024. (AP Photo/Omar Havana)

Pope Francis delivers his speech during his meeting with the professors in the Promotiezaal of the Catholic University of Leuven, Belgium, Friday, Sept. 27, 2024. (AP Photo/Andrew Medichini)

Pope Francis meets with King Philippe and Queen Mathilde in the Castle of Laeken, Brussels, Friday, Sept. 27, 2024. (AP Photo/Andrew Medichini)

Pope Francis attends a meeting with the professors in the Promotiezaal of the Catholic University of Leuven, Belgium, Friday, Sept. 27, 2024. (AP Photo/Andrew Medichini)

Pope Francis watches during a tours in an open car among the faithful in the Groet Markt in Leuven, Belgium, on the second day of his four-day visit to Luxembourg and Belgium, Friday, Sept. 27, 2024. (AP Photo/Omar Havana)

Pope Francis, left, flanked by Rector Luc Sels, delivers his blessing during his meeting with the professors in the Promotiezaal of the Catholic University of Leuven, Belgium, Friday, Sept. 27, 2024. (AP Photo/Andrew Medichini)

ALTERNATIVE CROP OF GB112 - Pope Francis delivers his message during a meeting with the authorities and the civil society in the Grande Galerie of the Castle of Laeken, Brussels, Friday, Sept. 27, 2024. (AP Photo/Andrew Medichini)

Pope Francis, left, flanked by Rector Luc Sels, delivers his speech during his meeting with the professors in the Promotiezaal of the Catholic University of Leuven, Belgium, Friday, Sept. 27, 2024. (AP Photo/Andrew Medichini)

Pope Francis flanked by King Philippe and Queen Mathilde delivers his message during a meeting with the authorities and the civil society in the Grande Galerie of the Castle of Laeken, Brussels, Friday, Sept. 27, 2024. (AP Photo/Andrew Medichini)

Pope Francis, right, listens to Rector Luc Sels's speech during his meeting with the professors in the Promotiezaal of the Catholic University of Leuven, Belgium, Friday, Sept. 27, 2024. (AP Photo/Andrew Medichini)

Pope Francis, Queen Mathilde and King Philippe listen to Belgium Prime Minister Alexander De Croo's address during a meeting with the authorities and the civil society in the Grande Galerie of the Castle of Laeken, Brussels, Friday, Sept. 27, 2024. (AP Photo/Andrew Medichini)