Before the Mass, some pilgrims sought shelter from the Southern Hemisphere winter chill beneath tarps while others wrapped themselves in blankets and sleeping bags. And many left offerings to the Virgin.
Lena Halfeld, a 65-year-old housewife, paused to add her offering to a cardboard box filled with stuffed animals, leg braces and other personal objects. She deposited an embossed invitation to her niece's December wedding, which she was praying for the Virgin to bless.
"I have real faith in the powers of the Virgin of Aparecida," said Halfeld, adding she had made the hours-long trip to the church once a week for a year during her husband's recent illness. "Now he's cured, so I owe it all to her. I can't think of a more wonderful setting to see the new pope."
Francis is in Brazil for World Youth Day, a church event that brings together young Catholics from around the world roughly every three years. Approximately 350,000 young pilgrims signed up to officially take part in the Youth Day events.
In Aparecida, 16-year-old Natalia Pereira, a high school student from Sao Paulo state, said the cold rain she endured to get to the basilica was a "test of faith."
"I've been up all night in line, I'm soaked to the bone and freezing but I'm so excited that it's worth it," said Pereira, who tried to huddle from the drizzle beneath a friend's large umbrella. "This is my first time seeing a pope and this was an opportunity of a lifetime for me. I wasn't about to let it go because of a little rain."