The Bishopric of Estonia was a medieval ecclesiastical territory established in the early 13th century. It was part of the Roman Catholic Church and played a significant role in the Christianization of the region. The bishopric was centered in the city of Tallinn, which became an important religious and cultural hub. The bishopric was governed by a bishop who held both spiritual and temporal power. Over time, it became part of the Archbishopric of Riga and was influenced by various political changes, including the Teutonic Order and later the Swedish Empire. The bishopric's influence waned in the 16th century with the rise of Protestantism.