Pope Leo XIV Calls for Unity in First Mass, Promises Leadership Beyond 'Autocratic' Style

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On Sunday, Pope Leo XIV officially began his papacy by reaching out to conservatives who felt abandoned by his predecessor, emphasizing unity and promising to uphold the Catholic Church’s traditions without governing like “an autocrat”.

Pope Leo was formally installed as the 267th pontiff of the Roman Catholic Church and sovereign monarch of Vatican City at an outdoor Mass in St Peter’s Square, following his first ride in the popemobile in front of tens of thousands.

Supporters in the crowd waved flags from the US and Peru, with people claiming him as the first pope from their respective countries.

Pope Leo XIV on his popemobile tours St. Peter's Square at the Vatican prior to the inaugural Mass of his pontificate

More than a dozen security guards surrounded the open-topped popemobile as it traveled through the square and along the boulevard leading to the Tiber River, marking Pope Leo’s inaugural ride. Source: AP / Andrew Medichini

Born in Chicago, the 69-year-old pontiff spent many years as a missionary in Peru and also has Peruvian citizenship.

The crowds chanted “Viva il Papa” (Long Live the Pope) and “Papa Leone” in Italian, as the iconic popemobile moved through St Peter’s Square.

Pope Leo XIV kisses a baby's head as he tours St. Peter's Square at the Vatican

The vehicle moved quickly, but briefly stopped twice so Leo could bless three babies. Source: AP / Andrew Medichini

Robert Prevost, a relative unknown on the world stage who only became a cardinal two years ago, was elected pope on 8 May after a short conclave of cardinals that lasted barely 24 hours.

Francis, an Argentine, died on 21 April after leading the Church for 12 often turbulent years during which he battled with traditionalists and championed the poor and marginalised.

The new Pope Leo XIV stands in St. Peter's Square at his inauguration.

Italian authorities deployed thousands of security officers for the event, alongside snipers on rooftops and anti-drone operations. Source: Getty / Picture Alliance

In his sermon, read in fluent Italian, Leo said that as leader of the world’s 1.4 billion Roman Catholics, he would not shrink before modern challenges and that, at least on social issues such as combating poverty and protecting the environment, he would continue the legacy of Pope Francis.

Saying he was taking up his mission “with fear and trembling”, Leo used the words “unity” or “united” seven times and the word “harmony” four times.

“It is never a question of capturing others by force, by religious propaganda or by means of power. Instead, it is always and only a question of loving, as Jesus did,” he said, in apparent reference to a war of words between Catholics who define themselves as conservative or progressive.

“Brothers and sisters, I would like that our first great desire be for a united Church, a sign of unity and communion, which becomes a leaven for a reconciled world,” he said.

Referring to St Peter, the 1st century Christian apostle from whom popes derive their authority, Leo said: “Peter must shepherd the flock without ever yielding to the temptation to be an autocrat, lording it over those entrusted to him. On the contrary, he is called to serve the faith of his brothers and sisters, and to walk alongside them.”

US Vice President JD Vance, a Catholic convert who clashed with Francis over the Trump administration’s hard-line immigration policies, led a US delegation alongside Secretary of State Marco Rubio, who is also Catholic.

Ukraine's President Volodymr Zelenskyy, left, and Vice President JD Vance greet each other at Pope Leo's formal inauguration

US Vice President JD Vance briefly shook hands with Ukrainian President Volodymyr Zelenskyy at the start of the inauguration ceremony. Zelenskyy last met Vance in February in the White House, when the two men clashed fiercely in front of the world’s media. Source: AP / Gregorio Borgia

of the inauguration in the Holy See.

He is expected to with his Ukrainian counterpart.

Many other world leaders attended the ceremony, including the presidents of Peru, Israel and Nigeria, the prime ministers of Italy, Canada and Australia, German Chancellor Friedrich Merz and European Commission President Ursula von der Leyen.

European royals also took their place in the VIP seats near the main altar, including Spanish King Felipe and Queen Letizia.

As part of the ceremony, Leo received two symbolic items: a liturgical vestment known as a pallium, a sash of lambswool representing his role as a shepherd, and the “fisherman’s ring”, recalling the first pope, St Peter, who was a fisherman.

The ceremonial gold signet ring is specially cast for each new pope and can be used by Leo to seal documents, although this purpose has fallen out of use in modern times.

It shows St Peter holding the keys to Heaven and will be broken after his death or resignation.

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