The installation, which takes place on St. Peter's Square, is the formal ceremony that inaugurates the new pope's term of office, or pontificate.
Leo XIV was elected pope on May 8 following a brief conclave and thus becomes the 267th person to hold the post. In a statement made in connection with the white smoke rising from the Sistine Chapel, Modéus stated:
"In a time of great challenges, spiritual leaders have an important role to play. This applies particularly to the leader of the world's largest community. I place great value on the good ecumenical cooperation with the Catholic Church in Sweden and internationally."