Rome (CNN)Pope Francis has announced that the Vatican next year will open its secret archives containing World War II-era documents from the controversial papacy of Pope Pius XII.
The archives cover the years 1939-1958 and consist of several hundred thousand letters, cables and speeches. Critics of Pius say he did not do enough to publicly combat the rise of fascism in Germany and Italy. Supporters say he worked diligently behind the scenes to save Jews from the Holocaust.