It is thus that the see appears in the sources from the 9th century on as "Nafpaktos of Nicopolis" (μητρόπολις Ναυπάκτου Νικοπόλεως), counting initially eight suffragans covering all of Epirus: Vonditsa, Aetos, Acheloos, Rogoi, Ioannina, Photike, Hadrianopolis, Buthrotum. In the "Escorial Taktikon" of the early 970s, the bishopric of Chimara has been added, and during the 11th century, two further sees, Kozyli and Arta were established under Nafpaktos. Following the Byzantine conquest of Bulgaria ca. 1020, the northern suffragan dioceses came under the jurisdiction of the Archbishopric of Ohrid.