Pope Leo XIV will be inaugurated as pontiff at a Mass in St Peter's Square. The service will mark the official start of his papacy. Leo was chosen as the new leader of the Catholic Church earlier this month following the death of his predecessor, Pope Francis, and a two-day conclave in Vatican City.

Pope Leo XIV officially opened his pontificate by taking his first popemobile tour through the piazza, a rite of passage that has become synonymous with the papacy's global reach and mediatic draw.