On 18 May 2025, Pope Leo XIV celebrated the inauguration Mass of his pontificate, formally known as the "Mass for the Beginning of the Petrine Ministry of the Bishop of Rome". The event was attended by some 200,000 people, including dozens of world leaders and 150 formal delegations. While Leo became the Roman pontiff at the moment of his acceptance in the Sistine Chapel upon being elected in the 2025 papal conclave, the inauguration celebration marked the formal beginning of his ministry as the bishop of Rome. The Mass included the bestowal of the pallium and Ring of the Fisherman, and was followed by meetings with various delegations and world leaders.
Infobox
Native name
Celebrazione Eucaristica per l'Inizio del Ministero del Vescovo di Roma
English name
Eucharistic Celebration for the Beginning of the Ministry of the Bishop of Rome
Date
18 May 2025 (2025-05-18)
Time
10 a.m. (CEST, UTC 02:00)
Venue
St. Peter's Square
Location
Vatican City
Type
Papal inauguration
Participants
200,000
Tables
· Official delegations › States
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Albania
Albania
Country
Albania
Official delegation
President Bajram Begaj
Andorra
Andorra
Country
Andorra
Official delegation
Co-Prince Archbishop Joan Enric Vives i Sicília, Representative of the French Co-Prince Patrice Faure, Prime Minister Xavier Espot and General Syndic Carles Ensenyat
Antigua and Barbuda
Antigua and Barbuda
Country
Antigua and Barbuda
Official delegation
Governor–General Rodney Williams
Argentina
Argentina
Country
Argentina
Official delegation
Minister of Foreign Relations Gerardo Werthein
Armenia
Armenia
Country
Armenia
Official delegation
President Vahagn Khachaturyan
Australia
Australia
Country
Australia
Official delegation
Prime Minister Anthony Albanese
Austria
Austria
Country
Austria
Official delegation
Chancellor Christian Stocker, Minister of Foreign Affairs Beate Meinl-Reisinger
Azerbaijan
Azerbaijan
Country
Azerbaijan
Official delegation
Speaker of the National Assembly Sahiba Gafarova
Bahamas
Bahamas
Country
Bahamas
Official delegation
Ambassador Joseph Curry
Belgium
Belgium
Country
Belgium
Official delegation
King Philippe of the Belgians and Queen Mathilde, Prime Minister Bart De Wever
Bolivia
Bolivia
Country
Bolivia
Official delegation
Ambassador Teresa Susana Subieta Serrano
Bosnia and Herzegovina
Bosnia and Herzegovina
Country
Bosnia and Herzegovina
Official delegation
Chairwoman of the Council of Ministers Borjana Krišto
Brazil
Brazil
Country
Brazil
Official delegation
Vice President Geraldo Alckmin
Canada
Canada
Country
Canada
Official delegation
Prime Minister Mark Carney
Colombia
Colombia
Country
Colombia
Official delegation
President Gustavo Petro
Croatia
Croatia
Country
Croatia
Official delegation
Prime Minister Andrej Plenković, Minister of Foreign Affairs Gordan Grlić-Radman, Speaker of the Parliament Gordan Jandroković
Cuba
Cuba
Country
Cuba
Official delegation
Salvador Valdés Mesa, Vice President of Cuba
Ecuador
Ecuador
Country
Ecuador
Official delegation
President Daniel Noboa
France
France
Country
France
Official delegation
Prime Minister François Bayrou
Gabon
Gabon
Country
Gabon
Official delegation
President Brice Oligui Nguema
Germany
Germany
Country
Germany
Official delegation
Chancellor Friedrich Merz
Georgia
Georgia
Country
Georgia
Official delegation
President Mikheil Kavelashvili
Hungary
Hungary
Country
Hungary
Official delegation
President Tamás Sulyok
India
India
Country
India
Official delegation
Deputy Chairman of Rajya Sabha Harivansh Narayan Singh
Ireland
Ireland
Country
Ireland
Official delegation
President Michael D. Higgins
Israel
Israel
Country
Israel
Official delegation
President Isaac Herzog
Italy
Italy
Country
Italy
Official delegation
President Sergio Mattarella, Prime Minister Giorgia Meloni, Minister of Foreign Affairs Antonio Tajani, President of the Senate Ignazio La Russa, President of the Chamber of Deputies Lorenzo Fontana and President of the Constitutional Court Giovanni Amoroso
Japan
Japan
Country
Japan
Official delegation
Former prime minister Taro Aso
Kosovo
Kosovo
Country
Kosovo
Official delegation
President Vjosa Osmani
Latvia
Latvia
Country
Latvia
Official delegation
Prime Minister Evika Siliņa
Lebanon
Lebanon
Country
Lebanon
Official delegation
President Joseph Aoun
Liechtenstein
Liechtenstein
Country
Liechtenstein
Official delegation
Hereditary Prince Alois and Hereditary Princess Sophie, Prime Minister Brigitte Haas
Lithuania
Lithuania
Country
Lithuania
Official delegation
President Gitanas Nauseda
Luxembourg
Luxembourg
Country
Luxembourg
Official delegation
Grand Duke Henri and Grand Duchess Maria Teresa, Prime Minister Luc Frieden
Malta
Malta
Country
Malta
Official delegation
Prime Minister Robert Abela
Mexico
Mexico
Country
Mexico
Official delegation
Secretary of the Interior Rosa Icela Rodríguez
Monaco
Monaco
Country
Monaco
Official delegation
Prince Albert II and Princess Charlene
Morocco
Morocco
Country
Morocco
Official delegation
Prime Minister Aziz Akhannouch
Montenegro
Montenegro
Country
Montenegro
Official delegation
Prime Minister Milojko Spajić
Mozambique
Mozambique
Country
Mozambique
Official delegation
Prime Minister Maria Benvinda Levy
Netherlands
Netherlands
Country
Netherlands
Official delegation
Queen Maxima and Prime Minister Dick Schoof
Nigeria
Nigeria
Country
Nigeria
Official delegation
President Bola Tinubu
Panama
Panama
Country
Panama
Official delegation
Javier Martinez-Acha, Minister of Foreign Affairs of Panama
Paraguay
Paraguay
Country
Paraguay
Official delegation
President Santiago Peña and President of the Chamber of Deputies Raúl Latorre
Peru
Peru
Country
Peru
Official delegation
President Dina Boluarte
Poland
Poland
Country
Poland
Official delegation
President Andrzej Duda
Portugal
Portugal
Country
Portugal
Official delegation
President Marcelo Rebelo de Sousa
Russia
Russia
Country
Russia
Official delegation
Ambassador to the Vatican Ivan Soltanovsky
San Lucia
San Lucia
Country
San Lucia
Official delegation
Gilbert Chaguory, Ambassador of St. Lucia to the Holy See
San Marino
San Marino
Country
San Marino
Official delegation
Captains Regent Denise Bronzetti and Italo Righi
Saudi Arabia
Saudi Arabia
Country
Saudi Arabia
Official delegation
Minister of Foreign Affairs Adel al-Jubeir and Prince Faisal bin Sattam Al Saud
Serbia
Serbia
Country
Serbia
Official delegation
Prime Minister Đuro Macut
Slovakia
Slovakia
Country
Slovakia
Official delegation
President Peter Pellegrini
Slovenia
Slovenia
Country
Slovenia
Official delegation
Prime Minister Robert Golob
Spain
Spain
Country
Spain
Official delegation
King Felipe VI and Queen Letizia, Deputy Prime Ministers María Jesús Montero and Yolanda Díaz, Minister of the Presidency and Justice Félix Bolaños and Leader of the Opposition Alberto Núñez Feijóo
Sweden
Sweden
Country
Sweden
Official delegation
Crown Princess Victoria, Minister for Social Affairs and Public Health Jakob Forssmed and Archbishop of Uppsala Martin Modéus
Switzerland
Switzerland
Country
Switzerland
Official delegation
President Karin Keller-Sutter
Taiwan (Republic of China)
Taiwan (Republic of China)
Country
Taiwan (Republic of China)
Official delegation
Former Vice President Chen Chien-jen
Togo
Togo
Country
Togo
Official delegation
President Faure Gnassingbé
Ukraine
Ukraine
Country
Ukraine
Official delegation
President Volodymyr Zelenskyy
United Kingdom
United Kingdom
Country
United Kingdom
Official delegation
Prince Edward, Duke of Edinburgh (representing the King of the United Kingdom and the Supreme Governor of the Church of England), Foreign Secretary David Lammy and Deputy Prime Minister Angela Rayner
United States of America
United States of America
Country
United States of America
Official delegation
Vice President JD Vance and Secretary of State Marco Rubio (and spouses)
Uzbekistan
Uzbekistan
Country
Uzbekistan
Official delegation
Speaker of the Legislative Chamber Nuriddinjon Ismailov
Ranked list
Country
Official delegation
Ref.
Albania
President Bajram Begaj
Andorra
Co-Prince Archbishop Joan Enric Vives i Sicília, Representative of the French Co-Prince Patrice Faure, Prime Minister Xavier Espot and General Syndic Carles Ensenyat
Antigua and Barbuda
Governor–General Rodney Williams
Argentina
Minister of Foreign Relations Gerardo Werthein
Armenia
President Vahagn Khachaturyan
Australia
Prime Minister Anthony Albanese
Austria
Chancellor Christian Stocker, Minister of Foreign Affairs Beate Meinl-Reisinger
Azerbaijan
Speaker of the National Assembly Sahiba Gafarova
Bahamas
Ambassador Joseph Curry
Belarus
Speaker of the House of Representatives Igor Sergeenko
Belgium
King Philippe of the Belgians and Queen Mathilde, Prime Minister Bart De Wever
Bolivia
Ambassador Teresa Susana Subieta Serrano
Bosnia and Herzegovina
Chairwoman of the Council of Ministers Borjana Krišto
Brazil
Vice President Geraldo Alckmin
Canada
Prime Minister Mark Carney
Colombia
President Gustavo Petro
Croatia
Prime Minister Andrej Plenković, Minister of Foreign Affairs Gordan Grlić-Radman, Speaker of the Parliament Gordan Jandroković
Cuba
Salvador Valdés Mesa, Vice President of Cuba
Ecuador
President Daniel Noboa
France
Prime Minister François Bayrou
Gabon
President Brice Oligui Nguema
Germany
Chancellor Friedrich Merz
Georgia
President Mikheil Kavelashvili
Hungary
President Tamás Sulyok
India
Deputy Chairman of Rajya Sabha Harivansh Narayan Singh
Ireland
President Michael D. Higgins
Israel
President Isaac Herzog
Italy
President Sergio Mattarella, Prime Minister Giorgia Meloni, Minister of Foreign Affairs Antonio Tajani, President of the Senate Ignazio La Russa, President of the Chamber of Deputies Lorenzo Fontana and President of the Constitutional Court Giovanni Amoroso
Japan
Former prime minister Taro Aso
Kosovo
President Vjosa Osmani
Latvia
Prime Minister Evika Siliņa
Lebanon
President Joseph Aoun
Liechtenstein
Hereditary Prince Alois and Hereditary Princess Sophie, Prime Minister Brigitte Haas
Lithuania
President Gitanas Nauseda
Luxembourg
Grand Duke Henri and Grand Duchess Maria Teresa, Prime Minister Luc Frieden
Malta
Prime Minister Robert Abela
Mexico
Secretary of the Interior Rosa Icela Rodríguez
Monaco
Prince Albert II and Princess Charlene
Morocco
Prime Minister Aziz Akhannouch
Montenegro
Prime Minister Milojko Spajić
Mozambique
Prime Minister Maria Benvinda Levy
Netherlands
Queen Maxima and Prime Minister Dick Schoof
Nigeria
President Bola Tinubu
Panama
Javier Martinez-Acha, Minister of Foreign Affairs of Panama
Paraguay
President Santiago Peña and President of the Chamber of Deputies Raúl Latorre
Peru
President Dina Boluarte
Poland
President Andrzej Duda
Portugal
President Marcelo Rebelo de Sousa
Russia
Ambassador to the Vatican Ivan Soltanovsky
· Official delegations › Other entities
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European Commission
European Commission
Subject of International Law
European Commission
Official delegation
Ursula von der Leyen
Sovereign Military Order of Malta
Sovereign Military Order of Malta
Subject of International Law
Sovereign Military Order of Malta
Official delegation
Prince and Grand Master John T. Dunlap
Ranked list
Subject of International Law
Official delegation
Ref.
European Commission
Ursula von der Leyen
Sovereign Military Order of Malta
Prince and Grand Master John T. Dunlap
· Official delegations › Religious figures › Christian communities
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Apostolic Churches
Apostolic Churches
Community
Apostolic Churches
Anglican Church
Anglican Church
Community
Anglican Church
Official delegation
Archbishop Leonard Dawea, Archbishop Stephen Cottrell, Presiding Bishop Sean Rowe and others
Armenian Apostolic Church
Armenian Apostolic Church
Community
Armenian Apostolic Church
Official delegation
Bishop Koryoun Baghdasaryan
Coptic Orthodox Church
Coptic Orthodox Church
Community
Coptic Orthodox Church
Official delegation
Bishop Barnaba of Turin and Rome, Bishop Damian of Northern Germany, Bishop Marc of Paris and Northern France, and Bishop Kyrillos of Los Angeles
Ecumenical Patriarchate of Constantinople
Ecumenical Patriarchate of Constantinople
Community
Ecumenical Patriarchate of Constantinople
Official delegation
Ecumenical Patriarch Bartholomew I of Constantinople
Union of Utrecht of the Old Catholic Churches
Union of Utrecht of the Old Catholic Churches
Community
Union of Utrecht of the Old Catholic Churches
Official delegation
Archbishop of Utrecht Bernd Wallet and Frank Bangerter, Bishop of Switzerland
Protestant communities
Protestant communities
Community
Protestant communities
Lutheran World Federation
Lutheran World Federation
Community
Lutheran World Federation
Official delegation
Anne Burghardt
World Council of Churches
World Council of Churches
Community
World Council of Churches
Official delegation
Heinrich Bedford-Strohm and Jerry Pillay
World Communion of Reformed Churches
World Communion of Reformed Churches
Community
World Communion of Reformed Churches
World Methodist Council
World Methodist Council
Community
World Methodist Council
Official delegation
Debra Padgett Wallace and Joshua Rathnam
Non-Nicaean communities
Non-Nicaean communities
Community
Non-Nicaean communities
The Church of Jesus Christ of Latter-day Saints
The Church of Jesus Christ of Latter-day Saints
Community
The Church of Jesus Christ of Latter-day Saints
Official delegation
Elder Matthew S. Holland
Ranked list
Community
Official delegation
Ref.
Apostolic Churches
Anglican Church
Archbishop Leonard Dawea, Archbishop Stephen Cottrell, Presiding Bishop Sean Rowe and others
Armenian Apostolic Church
Bishop Koryoun Baghdasaryan
Coptic Orthodox Church
Bishop Barnaba of Turin and Rome, Bishop Damian of Northern Germany, Bishop Marc of Paris and Northern France, and Bishop Kyrillos of Los Angeles
Ecumenical Patriarchate of Constantinople
Ecumenical Patriarch Bartholomew I of Constantinople
Union of Utrecht of the Old Catholic Churches
Archbishop of Utrecht Bernd Wallet and Frank Bangerter, Bishop of Switzerland
Protestant communities
Lutheran World Federation
Anne Burghardt
World Council of Churches
Heinrich Bedford-Strohm and Jerry Pillay
World Communion of Reformed Churches
World Methodist Council
Debra Padgett Wallace and Joshua Rathnam
Non-Nicaean communities
The Church of Jesus Christ of Latter-day Saints
Elder Matthew S. Holland
· Official delegations › Religious figures › Other religions
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Judaism
Judaism
Community
Judaism
Official delegation
Rabbi Noam Marans, Director of Interreligious Affairs of the American Jewish Committee
Ranked list
Community
Official delegation
Ref.
Judaism
Rabbi Noam Marans, Director of Interreligious Affairs of the American Jewish Committee
