A bishopric in northeastern Italy, adjacent to the angle of the Slovenian and Austrian borders, and extending south to the Adriatic Sea; the modern Italian province of Friuli closely covers the region. The bishopric was established in the 3rd century CE. A long-standing schism erupted here in 533, moving the bishop to renounce adherence to Roman authority, and style themselves Patriarchs, after the eastern fashion. For the next 160 years, Roman and Eastern parties contested each other for mastery; although Roman authority was ultimately upheld, the title of Patriarch was retained. The Patriarchs were invested with the COUNTY of FRIULI and the MARCH of CARNIOLA in 1077, and the MARCH of ISTRIA in 1209. Eventually, the secular territories were attached to Venice, and the Patriachate itself was suppressed in 1752