As Pope Leo XIV is formally inaugurated, he vows to work for unity so the church becomes a sign of peace in the world, with leaders including Vice President JD Vance and Ukrainian President Volodymyr Zelensky in attendance.

The formal inauguration of Leo XIV, the first ever American pope, is underway in a special Mass in St. Peter’s Square attended by world leaders, royalty, and tens of thousands of believers. The 267th pontiff arrived at the Vatican on the popemobile and was welcomed by cheers from the huge crowds as he toured St.