Question: Who is this Saint? She was a nun who converted to Catholicism from Judaism in 1922, but was ultimately rounded up as a non-Aryan by the Nazis and martyred at Auschwitz.
Answer: St. Teresa Benedicta of the Cross (Edith Stein)
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http://www.thedivinemercy.org/news/The-Other-Martyr-of-Auschwitz-4962