Pope Benedict XVI will canonize a woman who was a nun in Indiana this Sunday. The Blessed Mother Theodore Guerin, who was once banished from her congregation, will be the first U.S. saint the Roman Catholic Church has canonized in six years.

The pope will also be canonizing a Mexican bishop and two Italians who founded religious orders.

Guerin, along with six French nuns, arrived in Indiana in 1840 and founded the Sisters of Providence of St. Mary-of-the-Woods outside Terre Haute. Vincennes Bishop Celestin de la Hailandiere and Guerin argued over the control of St. Mary-of-the-Woods, and the bishop dismissed her from her vows, threatened he could excommunicate her and forbade her from the order she founded for some time. Guerin did not return until 1847, when the bishop resigned.

The AP reports that Sister Marcia Speth, one of the order's leaders, said, "The bishop here in Vincennes was impossible to work with, yet she always kept her faith. She held on to it. In that way, she witnesses to us how to be today in an imperfect, flawed, sinful church."

Guerin and the sisters raised money and built a Roman Catholic academy for girls that is now called St. Mary-of-the-Woods College and is the oldest Catholic college for women in the United States. The sisters went on to found schools all over the state of Indiana.

Guerin died in 1856 at the age of 57. She will be the eighth U.S. saint to achieve canonization, and the first one canonized since Sister Katherine Drexel in October 2000.