Italian dictator Benito Mussolini asked the Pope to excommunicate Adolf Hitler shortly before he went to Rome to seal their alliance in 1938, according to a Vatican document.
Details of Mussolini's secret request were found in the Vatican's recently opened secret archive which forms the basis of a book by Italian historian Emma Fattorini on the last days of Pius XI's papacy.
Ms Fattorini, a university professor in Rome, suggests the demand reflected the Italian leader's anger over Hitler's annexation of Austria in March 1938.
Although she also says Mussolini's actions may have been an attempt to set up the Church, in that if it did not act, he could accuse it of failing to listen to his warnings.
"Despite the many stop and go situations, we are in fact in the middle of full Italian-German accord - and it is this that makes the request for an excommunication so sensational," Ms Fattorini reportedly said.
She said the document - found in the archive opened in February - showed Mussolini was playing a "double game".
http://news.bbc.co.uk/2/hi/europe/3144984.stm