From AP:
Pope Leo XIV declared himself a Roman on Sunday as he completed the final ceremonial steps cementing his role as the bishop of Rome.
The first American Pope formally took possession of the St. John Lateran Basilica, which is Rome’s cathedral and seat of the diocese, with an evening Mass attended by Roman priests and faithful. He then took the popemobile for a visit to St. Mary Major, where he prayed before Pope Francis’ tomb and an icon of the Virgin Mary beloved to many Roman faithful.