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Pope Leo XIV Inaugurated as First American Pontiff in Vatican Ceremony

Leo XIV's inaugural Mass emphasized unity, social justice, ecological care, and global peace, marking the start of his leadership of the 1.4 billion-member Catholic Church.

Pope Leo XIV meets Vice President JD Vance after the formal inauguration of his pontificate in St. Peter's Square, at the Vatican, Sunday, May 18, 2025. (AP Photo/Alessandra Tarantino)
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JD Vance, the US vice president, and his wife, Usha, at St Peter’s Square

Overview

  • Pope Leo XIV, formerly Cardinal Robert Prevost of Chicago, officially began his papacy with an inaugural Mass attended by 200,000 people in St. Peter's Square.
  • As the first American pope, Leo XIV received traditional symbols of the papacy, including the Fisherman’s ring and the lamb’s wool pallium, during the ceremony.
  • World leaders, including Ukrainian President Volodymyr Zelensky, U.S. Vice President JD Vance, and Canadian Prime Minister Mark Carney, were among the dignitaries present for the event.
  • In his homily, Leo XIV called for unity within the Church, condemned economic systems that exploit the poor and the planet, and urged peace in conflict zones like Ukraine and Gaza.
  • The 69-year-old pontiff highlighted the Church’s mission as a force for harmony and inclusion, pledging to address global challenges such as social inequality and environmental degradation.