Pope Leo XIV, center, waves as he arrives with Bishop Giacomo Cardinali, vice prefect of the Vatican Library, fifth from left, Prefect of the Papal Household, Archbishop Petar Rajič, first at left, and President of the Pontifical Commission and Governorate of Vatican City State sister Raffaella Petrini, second from right, at the Vatican Library, Monday, Sept. 14, 2026, during a press preview of the exhibit "AQVA," which will be open to the public from Sept. 25 through May 14, 2027. (AP Photo/Andrew Medichini)