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Catholic Encyclopedia
http://www.newadvent.org/cathen/01388a.htm
St. Ambrose of Camaldoli, born Ambrose Traversari, theologian, translator of many of the Fathers, author, d. 1439.
For All the Saints
http://www.saintpatrickdc.org/ss/1120.htm#ambr
Short biography of Ambrose Traversari.