Pope Francis, center, speaks to the media aboard his flight bound for Luxembourg, where he will start a four-day apostolic journey in Luxembourg and Belgium, Thursday, Sept. 26, 2024. (Guglielmo Mangiapane/Pool Photo via AP)

Pope Francis goes on pope-mobile as he leaves after his weekly general audience in St. Peter's Square, at the Vatican, Wednesday, Sept. 25, 2024. (AP Photo/Gregorio Borgia)

Pope Francis is welcomed by Grand Duchess Maria Teresa, left, and Luxembourg's Grand Duke Henri, right, at the Grand Ducal Palace in Luxembourg, Thursday, Sept. 26, 2024. (AP Photo/Omar Havana)

Pope Francis arrives flanked by Queen Mathilde of Belgium and King Philippe of Belgium, at Melsbroek air base in Steenokkerzeel, near Brussels, on the first day of his four-day visit to Luxembourg and Belgium, Thursday, Sept. 26, 2024. (AP Photo/Geert Vanden Wijngaert)

A woman walks on a main boulevard in Luxembourg a day before the trip of Pope Francis to Luxembourg and Belgium, Wednesday, Sept. 25, 2024, (AP Photo/Geert Vanden Wijngaert)

Pope Francis flanked by Luxembourg's Grand Duke Henri and Grand Duchess Maria Teresa signs the guest book during his visit at the Grand Ducal Palace, in Luxembourg, Thursday, Sept. 26, 2024. (AP Photo/Andrew Medichini)

Pope Francis, leaft, speaks aboard his flight bound for Luxembourg, where he will start a four-day apostolic journey in Luxembourg and Belgium, Thursday, Sept. 26, 2024. (Guglielmo Mangiapane/Pool Photo via AP)

Pope Francis is welcomed by Grand Duchess Maria Teresa, left, and Luxembourg's Grand Duke Henri, right, at the Grand Ducal Palace in Luxembourg, Thursday, Sept. 26, 2024. (AP Photo/Omar Havana)

Pope Francis arrives as he holds his weekly general audience in St. Peter's Square, at the Vatican, Wednesday, Sept. 25, 2024. (AP Photo/Gregorio Borgia)

Pope Francis is aboard his flight bound for Luxembourg, where he will start a four-day apostolic journey in Luxembourg and Belgium, Thursday, Sept. 26, 2024. (Guglielmo Mangiapane/Pool Photo via AP)

Pope Francis is welcomed by Grand Duchess Maria Teresa, left, and Luxembourg's Grand Duke Henri, right, at the Grand Ducal Palace in Luxembourg, Thursday, Sept. 26, 2024. (AP Photo/Omar Havana)

Cardinals wait for Pope Francis upon his arrival at Melsbroek air base in Steenokkerzeel, near Brussels, on the first day of his four-day visit to Luxembourg and Belgium, Thursday, Sept. 26, 2024. (AP Photo/Geert Vanden Wijngaert)

Pope Francis is welcomed by Grand Duchess Maria Teresa, left, and Luxembourg's Grand Duke Henri, right, at the Grand Ducal Palace in Luxembourg, Thursday, Sept. 26, 2024. (AP Photo/Omar Havana)

Pope Francis talks to Queen Mathilde of Belgium upon his arrival at the Melsbroek air base in Steenokkerzeel, near Brussels, on the first day of his four-day visit to Luxembourg and Belgium, Thursday, Sept. 26, 2024. (AP Photo/Geert Vanden Wijngaert)

Pope Francis arrives after lunch to a bar near the archbishop's residence in Luxembourg for a coffee on the first day of his four-day visit to Luxembourg and Belgium, Thursday, Sept. 26, 2024. (Sala Stampa della Santa Sede via AP)

Flags of Vatican City and Luxembourg wave outside the Luxembourg City Hall a day before for the trip of Pope Francis to Luxembourg and Belgium, Wednesday, Sept. 25, 2024, (AP Photo/Geert Vanden Wijngaert)

Pope Francis is welcomed by Grand Duchess Maria Teresa, left, and Luxembourg's Grand Duke Henri, right, at the Grand Ducal Palace in Luxembourg, Thursday, Sept. 26, 2024. (AP Photo/Omar Havana)

Pope Francis is welcomed by bishops at the Melsbroek air base in Steenokkerzeel, near Brussels, on the first day of his four-day visit to Luxembourg and Belgium, Thursday, Sept. 26, 2024. (AP Photo/Geert Vanden Wijngaert)

Pope Francis meets the Catholic Community in the Luxembourg's Cathedral of Notre-Dame in Luxembourg, Thursday, Sept. 26, 2024. (AP Photo/Andrew Medichini)

Pope Francis greets children after meeting with the Catholic Community in the Luxembourg's Cathedral of Notre-Dame on the first day of his four-day visit to Luxembourg and Belgium, Thursday, Sept. 26, 2024. (AP Photo/Omar Havana)

Pope Francis arrives at Fiumicino International airport Leonardo da Vinci, some 30 kilometers south-west of Rome, Thursday, Sept. 26, 2024 to board the papal flight to Luxembourg for a four-day visit to Luxembourg and Belgium. (AP Photo/Gregorio Borgia)

Pope Francis arrives at Fiumicino International airport Leonardo da Vinci, some 30 kilometers south-west of Rome, Thursday, Sept. 26, 2024 to board the papal flight to Luxembourg for a four-day visit to Luxembourg and Belgium. (AP Photo/Gregorio Borgia)

A tramway crosses the iconic Adolphe Bridge where flags of the Vatican and Luxembourg are seen waving in the surrounding gardens on the day before Pope Francis' trip to Luxembourg and Belgium, Wednesday, Sept. 25, 2024, (AP Photo/Omar Havana)

Pope Francis arrives at Melsbroek air base in Steenokkerzeel, near Brussels, on the first day of his four-day visit to Luxembourg and Belgium, Thursday, Sept. 26, 2024. (AP Photo/Andrew Medichini)

Pope Francis arrives flanked by Queen Mathilde of Belgium and King Philippe of Belgium at the Melsbroek air base in Steenokkerzeel, near Brussels, on the first day of his four-day visit to Luxembourg and Belgium, Thursday, Sept. 26, 2024. (AP Photo/Andrew Medichini)

Pope Francis meets the Catholic Community in the Luxembourg's Cathedral of Notre-Dame in Luxembourg, Thursday, Sept. 26, 2024. (AP Photo/Andrew Medichini)

Pope Francis meets the Catholic Community in the Luxembourg's Cathedral of Notre-Dame in Luxembourg, Thursday, Sept. 26, 2024. (AP Photo/Andrew Medichini)

Pope Francis arrives flanked by Queen Mathilde of Belgium and King Philippe of Belgium, at Melsbroek air base in Steenokkerzeel, near Brussels, on the first day of his four-day visit to Luxembourg and Belgium, Thursday, Sept. 26, 2024. (AP Photo/Geert Vanden Wijngaert)

Pope Francis flanked by Luxembourg's Grand Duke Henri and Grand Duchess Maria Teresa signs the guest book during his visit at the Grand Ducal Palace, in Luxembourg, Thursday, Sept. 26, 2024. (AP Photo/Andrew Medichini)

Pope Francis arrives at Melsbroek air base in Steenokkerzeel, near Brussels, on the first day of his four-day visit to Luxembourg and Belgium, Thursday, Sept. 26, 2024. (AP Photo/Andrew Medichini)

Pope Francis arrives flanked by Queen Mathilde of Belgium and King Philippe of Belgium, at Melsbroek air base in Steenokkerzeel, near Brussels, on the first day of his four-day visit to Luxembourg and Belgium, Thursday, Sept. 26, 2024. (AP Photo/Geert Vanden Wijngaert)

Pope Francis arrives flanked by Queen Mathilde of Belgium and King Philippe of Belgium, at Melsbroek air base in Steenokkerzeel, near Brussels, on the first day of his four-day visit to Luxembourg and Belgium, Thursday, Sept. 26, 2024. (AP Photo/Geert Vanden Wijngaert)

King Philippe of Belgium waits for Pope Francis at Melsbroek air base in Steenokkerzeel, near Brussels, on the first day of his four-day visit to Luxembourg and Belgium, Thursday, Sept. 26, 2024. (AP Photo/Geert Vanden Wijngaert)

Pope Francis arrives welcomed by Queen Mathilde of Belgium and King Philippe of Belgium, at Melsbroek air base in Steenokkerzeel, near Brussels, on the first day of his four-day visit to Luxembourg and Belgium, Thursday, Sept. 26, 2024. (AP Photo/Geert Vanden Wijngaert)

Pope Francis arrives flanked by Queen Mathilde of Belgium and King Philippe of Belgium, at Melsbroek air base in Steenokkerzeel, near Brussels, on the first day of his four-day visit to Luxembourg and Belgium, Thursday, Sept. 26, 2024. (AP Photo/Geert Vanden Wijngaert)