Saint Stanislaus of Szczepanów was a Polish bishop and martyr, born around 1030 in what is now Poland. He is best known for his strong opposition to the immoral behavior of King Bolesław II, which ultimately led to his martyrdom in 1079. Stanislaus was canonized by Pope Innocent IV in 1253, and he became the patron saint of Poland. His feast day is celebrated on April 11, and he is often depicted in art holding a cross and a book. Saint Stanislaus is revered for his commitment to justice and his role in promoting the Christian faith in Poland, making him an important figure in Polish history and culture.