Pope Leo XIV vowed to work for unity so that Catholic Church becomes a sign of peace in the world; he offered a message of communion during his inaugural Mass

Tens of thousands came to St. Peter’s Square to mark the official start of the pontificate of the first American to lead the Roman Catholic Church. Vice President JD Vance was among the dignitaries who attended.

After the Holy See announced a new pope — Pope Leo XIV, the successor to Pope Francis — attention will turn to the Catholic churches in Philadelphia and throughout Pennsylvania for ways to welcome the new pope. But will there be an official Mass to welcome the new pope? Here's what we know.