Pope Leo XIV will preside over his inaugural mass Sunday, May 18, with world leaders and large crowds expected to gather in St. Peter’s Square at the Vatican. Following the death of Pope Francis on April 21, a conclave commenced May 7, bringing together a private group of cardinals tasked with voting for a new leader of the Roman Catholic Church.

Pope Leo XIV’s inaugural mass at St. Peter’s Square on Sunday drew about 200,000 people, according to the Vatican. Vice President JD Vance, US Secretary of State Marco Rubio, and Ukrainian President Volodymyr Zelensky, were among the world leaders who traveled to Rome to attend.