A faithful exchange a sign of peace as Pope Francis presides the holy mass , at the King Baudouin stadium in Brussels, Belgium, Sunday, Sept. 29, 2024. (AP Photo/Omar Havana)

Faithful listen as Pope Francis presides the holy mass , at the King Baudouin stadium in Brussels, Belgium, Sunday, Sept. 29, 2024. (AP Photo/Omar Havana)

A faithful prays as Pope Francis presides the holy mass , at the King Baudouin stadium in Brussels, Belgium, Sunday, Sept. 29, 2024. (AP Photo/Omar Havana)

Pope Francis is greeted by Cardinal Jozef De Kesel during the farewell ceremony at Melsbroek Air Base at the end of a four-day visit to Belgium and Luxembourg, Sunday, Sept. 29, 2024. (AP Photo/Geert Vanden Wijngaert)

Pope Francis leaves at the end of the Sunday mass at King Baudouin Stadium, in Brussels Sunday, Sept. 29, 2024. (AP Photo/Omar Havana)

Pope Francis is greeted by Archbishop Luc Terlinden during the farewell ceremony at Melsbroek Air Base at the end of a four-day visit to Belgium and Luxembourg, Sunday, Sept. 29, 2024. (AP Photo/Geert Vanden Wijngaert)

Pope Francis waves as he arrives to lead the holy mass , at the King Baudouin stadium in Brussels, Belgium, Sunday, Sept. 29, 2024. (AP Photo/Omar Havana)

Queen Mathilde and King Philippe arrives to attend the holy mass by Pope Francis at the King Baudouin stadium in Brussels, Belgium, Sunday, Sept. 29, 2024. (AP Photo/Omar Havana)