More than two million people attended the Mass celebrated by Pope Leo XIV outdoors in the Argentine capital, TV channel TN reported.
During the Mass, Leo XIV remembered his predecessor, Pope Francis, who served as archbishop of Buenos Aires before being elected pope in March 2013.
Leo XIV arrived in Argentina on November 8 and will remain in the country until November 11, after which he will leave for Peru. In the past the Pope made a visit to Uruguay.
Video: Elena Kondrativa/ TASS.