Cars honked their horns as the news spread and television announcers screamed with elation and surprise.
There was excitement as well elsewhere.
At the St. Francis of Assisi church in the colonial Old San Juan district in Puerto Rico, church secretary Antonia Veloz exchanged jubilant high-fives with Jose Antonio Cruz, a Franciscan friar.
Cruz said he personally favored the Brazilian candidate, but was pleased with the outcome, saying the new pope would help revitalize the church.
"It's a huge gift for all of Latin America. We waited 20 centuries. It was worth the wait," said Cruz, wearing the brown cassock tied with a rope that is the signature of the Franciscan order. "Everyone from Canada down to Patagonia is going to feel blessed. This is an event."
"This is something exciting," the 50-year-old Veloz said of the new Argentine pope. "I'm speechless." In Santo Domingo, the bells pealed in the city's main cathedral in the colonial district.
In Panama City, public relations executive Nelsa Aponte said with teary eyes, "This made me cry, I had to get out my handkerchief."
"We have a new pastor, and for the first time, he is from Latin America."