Fürstbistum Ermland
In 1243, the Papal legate William of Modena divided Prussia into four bishoprics: Culm (Chełmno), Pomesania, Ermland (Warmia) and Samland (Sambia). The bishoprics became suffragans to the Archbishopric of Riga under the mother city of Visby on Gotland. Each diocese was fiscally and administratively divided into one-third reserved for the maintenance of the capitular canons, and two-thirds were where the Order collected the dues. The cathedral capitular canons of Culm, Pomesania and Samland were simultaneously members of the Teutonic Order since the 1280s, ensuring a strong influence by the Order. Only Warmia's diocesan chapter maintained independence, enabling to establish its autonomous rule in the capitular third of Warmia's diocesan territory (Prince-Bishopric of Warmia).