Edith Stein (1891)
Born into an observant Jewish family, Stein converted to Christianity in 1922. After studying philosophy, she became a nun in 1934. She moved from Germany to the Netherlands to avoid Nazi persecution, but in 1942 she was arrested because of her Jewish heritage. She was sent to the Auschwitz concentration camp and died in the gas chamber that year. She was canonized by Pope John Paul II in 1998 and is also known as Saint Teresa Benedicta of the Cross.