In keeping with Italian law, all of the religious leaders, including Pope Francis, wore a mask except when delivering their speeches, which they did while keeping a distance from those listening.
Two symbolic sites, the Hagia Sophia and the Mosque-Cathedral of Córdoba, could serve as models for international and interreligious cooperation, writes Peter Dziedzic.
The Unesco World Heritage site in Istanbul, founded as a Christian church in the 6th century, transformed into a mosque in the 15th century and then into a museum in 1934, will reopen as a mosque on July 24 with Friday prayers.