Nahum Sokolow, head of the World Zionist Organization, met with Pacelli in 1917 and then again in 1925 to discuss establishing a Jewish homeland in Palestine. Pacelli arranged for Sokolow to meet with Pope Benedict XV to discuss this ambitious project

President of the World Zionist Organization Nahum Sokolow wrote in his own words: May 12, 1917 I was fi rst of all received by Msgr. Eugenio Pacelli, Secretary for Extraordinary Aff airs and had a few days later a long conference with Cardinal Secretary of State Gasparri. Both meetings were extraordinarily friendly and positive . . . I don’t tend towards credulity or exaggerations and still I can’t avoid to stress that this revealed an extraordinary amount of friendship: to grant a Jew and representative of Zionism with such a promptness a private audience which took so long and was of such a warmth and took place with all assurance of sympathy, both for the Jews in general and for Zionism in special, proves that we don’t need to expect any obstacles which can’t be overcome from the side of the Vatican. Th e Pope [Benedict XV] asked me: Pacelli told me about your mission; do you want to tell me any more details?. Source: Pope Pius XII and World War II: The Documented Truth