Pope Innocent IV canonised Stanislaus of Szczepanów, establishing him as a revered figure in the Catholic Church. Stanislaus was a bishop in Poland, who became the center of conflict during the reign of King Bolesław II. His unwavering commitment to the Church and its teachings led to his martyrdom, as he openly opposed the king's actions and moral conduct. He was ultimately killed in 1079 for his defiance. The canonisation by Pope Innocent IV took place amidst ongoing strife in Poland, where the authority of the monarchy was often questioned. By granting sainthood to Stanislaus, the Pope not only recognized the spiritual significance of his life and death but also provided a unifying figure for the Polish people in the face of political instability.

The ceremony was held in Rome, where Innocent IV, who was known for his efforts to strengthen the papacy's influence in Europe, sought to affirm the Church's role in mediating conflicts. The pope's decision to canonise Stanislaus served as a statement of the Church's authority over secular power, particularly in the context of Poland's turbulent history under Bolesław II. This act of canonisation solidified the memory of Stanislaus as a defender of the faith, inspiring future generations of Poles and enhancing the saint's influence in the region's Christian practices and local governance.

Furthermore, the canonisation also had a long-lasting impact on Polish culture and identity, making Stanislaus a patron saint who embodied resistance against tyranny and moral corruption. Public veneration of Stanislaus flourished, and many churches and institutions were founded in his honor. His legacy continues to be celebrated in Poland, reinforcing the connection between the Church and the Polish national identity.