Leo XIV holds the largest Mass of his papacy with 2.5 million faithful in Buenos Aires

Pope Leo XIV celebrated a Mass in Buenos Aires attended by about 2.5 million people, the largest gathering of his papacy so far. The huge turnout followed a strongly political address to President Javier Milei and Argentine officials, highlighting the Pope’s dual role as religious leader and public voice.

People began arriving overnight at Palermo Park, where the ceremony and surrounding streets were served by 33 large screens over a stretch more than two kilometres long. The government declared a national holiday, and attendees came from across Argentina and neighbouring countries; Leo’s visit also includes planned Masses in Córdoba and Luján before he travels to Peru.