St. Faustina Kowalska was born in Poland in 1905. She grew up in a very small village and was part of a large familly of 10 children. Just before the age of twenty she joined the Congregation of the Sisters of Our Lady of Mercy, which focuses on education, much like our own Christian Brothers. This Congregation specifically focuses on the education and care of troubled women, while our Christian Brothers is based on primary education.
After joining the congregation she took the name Sister Maria Faustina of the Most Blessed Sacrament. She began to have visions of Jesus. She predicted several visions of her future, including her death. She became a Saint because she had those visions.
She was brought to life once more when an american from Massachusetts prayed at her tomb, and was healed of her Lymphedema, even after she had around a dozen surguries to help correct it. In addition to her visions, she helped heal a woman. This eventually lead to her Sainthood.