The Archdiocese of Gniezno is one of the oldest and most significant Roman Catholic dioceses in Poland. Established in the 10th century, it serves as the spiritual center for the Catholic Church in the country. The archdiocese is located in the city of Gniezno, which is historically important as the first capital of Poland and the site of the coronation of the first Polish kings. The archdiocese is part of the larger ecclesiastical province of Poznań and oversees several other dioceses in the region. It plays a crucial role in the religious life of Polish Catholics, promoting faith, education, and community service through various programs and initiatives.