>>20242198
Well, on October 16, 1943, the S.S. had lists of all the Jews in Rome, and went door to door and tried to arrest all of Rome's Jews, thousands of them.
They found about 1,260 arrested them, brought them to a military college just outside the walls of the Vatican, and held them there for two days. What we now learn from these recently opened archives is that the Vatican worked very hard to show that some of them had been baptized and therefore shouldn't be considered Jews, from the point of view of the church, and, therefore, should not be he shipped off to Auschwitz with the rest of them.
https://www.pbs.org/newshour/show/vatican-documents-show-secret-back-channel-between-pope-pius-xii-and-adolph-hitler