Pope Leo XIV will preside over his inaugural mass today in front of St Peter’s Basilica, which marks the formal start of his papacy. JD Vance, Marco Rubio and Volodymyr Zelenskyy are attending.

Vice President JD Vance is headed back to Vatican City for Pope Leo XIV's inaugural Mass, a week after the first American pope was selected.

Pope Leo XIV presided over his inaugural mass Sunday, May 18, with world leaders and a crowd of 200,000 people gathered 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.