The man who later became Pope John XXIII tried in vain to challenge the Vatican's perceived indifference to the Nazi Holocaust, a new study has found. Papers and diaries show then Archbishop Giuseppe Roncalli posted an urgent telegram in 1944 to Pope Pius XII on the atrocities at Auschwitz.
The telegram's date contradicts the Vatican's official version of when it received a report. BBC
More about Pius XII
Even more about Pius XII and the Nazi's here