Front. In his 1942 Christmas Eve message, he expressed concern for "those hundreds of thousands, who ... sometimes only by reason of their nationality or race, are marked down for death or progressive extinction. On 7 April 1943, Msgr. Tardini, one of Pius XII's closest advisors, advised Pius XII that it would be politically advantageous after the war to take steps to help Slovak Jews. In January 1943, Pius XII declined to denounce publicly the Nazi discrimination against the Jews, following requests to do so from Władysław Raczkiewicz, president of the Polish government-in-exile, and Bishop Konrad von Preysing of Berlin. According to Toland, in June 1943, Pius XII addressed the issue of mistreatment of Jews at a conference of the Sacred College of Cardinals and said: "Every word We address to the competent authority on this subject, and all Our public utterances have to be carefully weighed and measured by Us in the interests of the victims themselves, lest, contrary to Our intentions, We make their situation worse and harder to bear". On 26 September 1943, following the German occupation of northern Italy, Nazi officials gave Jewish leaders in Rome 36 hours to produce of gold (or the equivalent) threatening to take 300 hostages. Then Chief Rabbi of Rome Israel Zolli recounts in his memoir that he was selected to go to the Vatican and seek help. The Vatican offered to loan 15 kilos, but the offer proved unnecessary when the Jews received an extension. Soon afterward, when deportations from Italy were imminent, 477 Jews were hidden in the Vatican itself and another 4,238 were protected in Roman monasteries and convents. Eighty percent of Roman Jews were saved from deportation. Phayer argues that the German diplomats in Rome were the "initiators of the effort to save the city's Jews", but holds that Pius XII "cooperated in this attempt at rescue", while agreeing with Zuccotti that the pope "did not give orders" for any Catholic institution to hide Jews. On 30 April 1943, Pius XII wrote to Bishop Graf von Preysing of Berlin to say: "We give to the pastors who are working on the local level the duty of determining if and to what degree the danger of reprisals and of various forms of oppression occasioned by episcopal declarations ... ad maiora mala vitanda (to avoid worse) ... seem to advise caution. Here lies one of the reasons, why We