Chicago-born Leo officially opened his pontificate by taking his first popemobile tour through the piazza, a rite of passage that has become synonymous with the papacy’s global reach and mediatic draw.

Leo received a standing ovation as he entered the Vatican auditorium for his first meeting with representatives of the general public. The 69-year-old Augustinian missionary, elected in a 24-hour conclave last week, called for journalists to use words for peace, to reject war and to give voice to the voiceless.

In his first formal meeting with cardinals, which began with a standing ovation, the new pontiff said he chose his papal name to continue down the path of Pope Leo XIII, who addressed “the social question in the context of the first great industrial revolution.”

In the breathless day since Pope Leo XIV’s election as the first American pontiff, the memes, doctored images and tongue-in-cheek references have piled up deeper than Chicago’s pizza and more loaded than its hot dog, seemingly irresistible to comics and commoners alike.

Elected on Thursday, Robert Prevost is the first pope from the United States in the history of the Catholic Church. And Prevost’s brother, John, said the Chicago-born missionary cheered for the White Sox.

Speakers blasted songs including “Born in the U.S.A.” and “American Pie” as six cardinal electors from the United States gathered in Rome on Friday to share their thoughts on the election of the first U.S.-born pope, Cardinal Robert Prevost.

Pope Leo XIV spoke off-the-cuff in English in the Sistine Chapel to the cardinals who elected him to follow in the footsteps of Pope Francis, who put a commitment to social justice at the core of his papacy. He acknowledged the great responsibility they had placed on him before delivering a brief but dense homily on the need to joyfully spread Christianity.

Cardinal Robert Prevost was born in Chicago, grew up in south suburban Dolton and served as prior of a local Augustinian order. He will now be known as Pope Leo XIV.

White smoke poured from the chimney of the Sistine Chapel and the great bells of St. Peter’s Basilica tolled Thursday after cardinals elected the 267th pope to lead the Catholic Church on the second day of their conclave.