Analysis of information sources in references of the Wikipedia article "Mosque of Rome" in English language version.
The late dictator, a devout Catholic who signed the treaty that made Vatican City a sovereign state, once told his aides there would be a mosque in Rome only when Moslems allowed a Roman Catholic church in Mecca, the holy city of Islam.
When the idea first came up more than five decades ago - building a mosque in Rome for subjects from Italy's colonial holdings in Africa - Benito Mussolini is reported to have said absolutely no. There will be a mosque in Rome, the Fascist ruler said, only when a Roman Catholic church is permitted in Mecca