Euphrasius, episcopus Parentinus

Euphrasius, the bishop of Poreč, imposes a variety of taxes, including the tithe and the ecclesiastical quartese (the quarter of the tithe) on the citizens of his bishopric. The document aimed at proving the episcopal lordship over the city of Poreč and fixing the tributes due to the Church of Poreč, forged in the first half of the 13^th century (before 1222).

Pope Pelagius I writes to a patrician John on the detrimental effects of the schism in the Church (the so-called Three Chapters Controversy), singling out Bishop Euphrasius as a particularly depraved schismatic and advising the patrician to repress the schismatics in the province of Aquileia (that is, the region Venetia et Histria).