Overview
- Pope León XIV landed in Buenos Aires on Sunday and is beginning a four‑day apostolic visit that runs through Wednesday with an official welcome at Aeroparque and a scheduled meeting with President Javier Milei.
- Argentina's state intelligence agency, SIDE, reported the detention of a suspect over alleged death threats against the Pope in the 24–48 hours before his arrival, a move the agency said followed coordination with federal police and a federal court in Campana.
- The national government mobilized a large security plan that it says involves about 50,000 personnel from federal forces, SIDE and local police to protect public liturgies and institutional events and to manage expected crowds.
- Officials have declared a national holiday on Monday with partial local holidays on Tuesday and Wednesday to facilitate participation in free, open masses and events that include a large liturgy in Palermo, a visit to Claypole’s Cottolengo and a closing Mass in Luján.
- León XIV's trip follows an October operation for an early lung adenocarcinoma that raised doubts about the tour but ended with medical clearance to travel, and it marks the first papal visit to Argentina since 1987.