Around 2.5 million people assembled in Buenos Aires for Pope Leo XIV's first mass in Argentina, Dagens Nyheter reports. The pontiff arrived in the country on Sunday following a stay of several days in Uruguay, and by Monday morning he was celebrating the first mass in Argentina led by a sitting pope since John Paul II in 1987.
The service took place at the Monumento a los Españoles in the capital, the same location where John Paul II held his mass nearly four decades ago. According to the authorities, the crowd reached 2.5 million, and the Vatican said it was the largest gathering Leo XIV has celebrated a mass for to date.
Why it matters
The scale of the turnout places the Buenos Aires event among the largest public gatherings of Leo XIV's pontificate so far, based on the Vatican's own comparison. It also ties the current pope to a landmark moment in Argentine Catholic history: no reigning pontiff had said mass in the country since John Paul II's visit in 1987, according to Dagens Nyheter.
The timing of the visit adds a regional dimension. Leo XIV came to Argentina from Uruguay, where he had spent several days, making this a two-country South American trip rather than a single stop. The Monday mass in Buenos Aires served as the centerpiece of the Argentine leg.
A return to a historic site
The choice of the Monumento a los Españoles links the two papal masses across a span of 39 years. John Paul II celebrated at the same monument in the capital in 1987, and Monday's service returned a sitting pope to that ground for the first time since.
Dagens Nyheter reports that the pope's arrival in Argentina came on Sunday, with the first mass following on Monday morning. Crowd estimates attributed to the authorities put attendance at about 2.5 million, a figure the Vatican used as the basis for calling the event Leo XIV's largest mass to date.
The reporting does not specify further details of the liturgy, the pope's remarks, or security arrangements. What is documented is the sequence: a multi-day stay in Uruguay, arrival in Argentina on Sunday, and a mass at the Monumento a los Españoles on Monday morning that drew a crowd the Vatican describes as unprecedented for this pontificate.
What to watch
Further Vatican statements and Argentine official figures may refine the crowd estimate in the coming days, and the remainder of Leo XIV's Argentine visit will indicate whether the Buenos Aires turnout sets a benchmark for the rest of the trip.
