VATICAN CITY (AP) — Pope Leo XIV affirmed Friday that thefamilyis founded on the "stable union between a man and a woman," and that the unborn and elderlyenjoy dignityas God's creatures, articulating clear Catholic teaching on marriage and abortion at the start of his pontificate. Leo,the first American pope, also called for reviving multilateral diplomacy and promoting dialogue between religions in the search for peace, in his first meeting with the Vatican diplomatic corps. The encounter is one of the protocol requirements after a conclave, allowing a new pope to greet representatives of world governments ahead of his formal installation Mass this Sunday. The Holy See is a sovereign state under international law, has diplomatic relations with over 180 countries and enjoys observer status at the United Nations. Leo, a member of the Augustinian religious order, has emphasized peace as a priority of his pontificate, from the first words he uttered on the loggia of St. Peter's Basilica, "Peace be with you all." ___ Associated Press religion coverage receives support through the AP'scollaborationwith The Conversation US, with funding from Lilly Endowment Inc. The AP is solely responsible for this content.