Pope Leo XIV Formally Opens His Pontificate with Mass in St. Peter’s Square Before Tens of Thousands

Pope Leo XIV greets the crowd from the popemobile before a Holy mass for the beginning of his pontificate, in St. Peter's square in The Vatican on May 18, 2025. (AFP)
Pope Leo XIV greets the crowd from the popemobile before a Holy mass for the beginning of his pontificate, in St. Peter's square in The Vatican on May 18, 2025. (AFP)
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Pope Leo XIV Formally Opens His Pontificate with Mass in St. Peter’s Square Before Tens of Thousands

Pope Leo XIV greets the crowd from the popemobile before a Holy mass for the beginning of his pontificate, in St. Peter's square in The Vatican on May 18, 2025. (AFP)
Pope Leo XIV greets the crowd from the popemobile before a Holy mass for the beginning of his pontificate, in St. Peter's square in The Vatican on May 18, 2025. (AFP)

Pope Leo XIV officially opened his pontificate as history’s first American pope on Sunday, presiding over an inaugural Mass in St. Peter’s Square before tens of thousands of people, presidents, patriarchs and princes in a ceremony that blended ancient ritual, evocative symbols and a nod to modern-day celebrity.

Leo launched the celebration 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, used at home and abroad to bring popes close to their flock. The 69-year-old Augustinian missionary smiled and waved from the back of the truck, but didn't appear to stop to kiss babies.

Security was tight as civil protection crews in neon uniforms funneled pilgrims into quadrants in the piazza and up and down the boulevard that leads to it.

US Vice President JD Vance, one of the last foreign officials to see Pope Francis before he died, paid his respects at the Argentine pope's tomb upon arriving in Rome late Saturday and headed the US delegation honoring the Chicago-born Leo.

After the public tour in the square, Leo went into the basilica to pray at the tomb of St. Peter, considered to be the first pope, under the basilica’s main altar and then processed out into the piazza for the Mass.

Strict diplomatic protocol dictated the seating arrangements, with both the United States and Peru getting front-row seats thanks to Leo’s dual citizenship. Vance, a Catholic convert who tangled with Francis over the Trump administration’s mass migrant deportation plans, is being joined by US Secretary of State Marco Rubio, who arrived in Rome ahead of time to try to advance Russia-Ukraine peace talks.

Peruvian President Dina Boluarte is one of around a dozen heads of state attending, as well as Ukrainian President Volodymyr Zelenskyy. Russia is being represented by the culture minister, Olga Liubimova.

Diplomatic protocol also dictated the dress code: While most wore black, the handful of Catholic queens and princesses — Charlene of Monaco and Letizia of Spain among others — wore white in a special privilege allowed them. Three dozen of the world’s other Christian churches sent their own delegations, headed by patriarchs, reverends, ministers and metropolitans, while the Jewish community had a 13-member delegation, half of them rabbis.

Kalen Hill, a pilgrim from the US, got to St. Peter's soon after the gates opened at dawn Sunday morning and said he never expected an American would lead the 1.4-billion strong church.

“I would say all the Americans are emotional about it," he said. "It is really powerful for American Catholics who sometimes feel separated from the world church to be brought in and included in this community through Pope Leo.”

During the Mass, Leo will receive the two potent symbols of the papacy: the lambswool stole, known as a pallium, and the fisherman’s ring. The pallium, draped across his shoulders, symbolizes the pastor carrying his flock as the pope carries the faithful. The ring, which becomes Leo’s official seal, harks back to Jesus’ call to the apostle Peter to cast his fishing nets.

The other symbolically important moment of the Mass is the representational rite of obedience to Leo: Whereas in the past all cardinals would vow obedience to the new pope, more recent papal installations involve representatives of cardinals, bishops, priests, deacons, nuns, married couples and young people participating in the rite.

Another change from the past is that Sunday's Mass isn't a coronation ceremony, which used to involve the pope receiving a tiara, but is merely known as a Mass to start the pope's ministry as the bishop of Rome.

In the days since his historic election, Leo has already sketched out some of his key priorities as pope. In his first foreign policy address, he said the Holy See's three pillars of diplomacy were peace, justice and truth. In his first major economics address, he emphasized the Catholic Church's social doctrine and the search for truth. It's not known if he'll use his installation homily as a mission statement as some of his predecessors did.

After the homily and at the end of the Mass, Leo will offer a final blessing and then go into the basilica to greet the heads of the more than 150 official delegations attending.

Security was tight, as it was for Francis’ funeral on April 26, which drew an estimated 250,000 people. Rome authorities are planning for another 250,000 on Sunday. The piazza and main boulevard leading to it, and two nearby piazzas were set up with giant television screens, and dozens of portable toilets have been erected in a nearby park.



Study: Highest Number of Conflicts Worldwide in 2024 Since 1946

Palestinians mourn their relatives who were killed in an Israeli military strike on Gaza, during their funeral in al-Shifa hospital in Gaza City, Tuesday, June 10, 2025. (AP Photo/Jehad Alshrafi)
Palestinians mourn their relatives who were killed in an Israeli military strike on Gaza, during their funeral in al-Shifa hospital in Gaza City, Tuesday, June 10, 2025. (AP Photo/Jehad Alshrafi)
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Study: Highest Number of Conflicts Worldwide in 2024 Since 1946

Palestinians mourn their relatives who were killed in an Israeli military strike on Gaza, during their funeral in al-Shifa hospital in Gaza City, Tuesday, June 10, 2025. (AP Photo/Jehad Alshrafi)
Palestinians mourn their relatives who were killed in an Israeli military strike on Gaza, during their funeral in al-Shifa hospital in Gaza City, Tuesday, June 10, 2025. (AP Photo/Jehad Alshrafi)

The world saw the highest number of armed conflicts in almost 80 years in 2024, dethroning 2023 as a record year, a Norwegian study published Wednesday showed, highlighting the risks linked to a US disengagement.

Last year, 61 conflicts were registered in the world across 36 countries, with some countries experiencing several simultaneous conflicts, the report by the Peace Research Institute of Oslo (Prio) said.

In 2023, there were 59 conflicts in 34 countries, AFP reported.

"This is not just a spike -- it's a structural shift," said Siri Aas Rustad, the main author of the report which covers trends in armed conflicts in the period 1946-2024.

"The world today is far more violent, and far more fragmented, than it was a decade ago," she said.

Africa remained the most ravaged continent, with 28 conflicts involving at least one state, followed by Asia with 17, the Middle East with 10, Europe with three and the Americas with two.

More than half of these countries experienced two or more conflicts.

The number of deaths resulting from fighting remained around the same level as in 2023, at about 129,000, making 2024 the fourth-deadliest year since the end of the Cold War in 1989, the study said.

The death toll was led by the wars in Ukraine and the Gaza Strip, as well as clashes in the Tigray region of Ethiopia.

"Now is not the time for the United States -– or any global power -– to retreat from international engagement," Rustad said.

"Isolationism in the face of rising global violence would be a profound mistake with long-term human life consequences," she said, a reference to US President Donald Trump's "America First" campaign.

"It is a mistake to assume the world can look away. Whether under President Trump or any future administration, abandoning global solidarity now would mean walking away from the very stability the US helped build after 1945," she said.

The study is based on data compiled by Sweden's Uppsala University.