FORUM IULIUM CARNICUM
Forum Iulium Carnicum is now Zuglio in Carnia. Originally a village, then a forum, and later a colony, it stood on the road that led from Aquileia through the Monte Croce Carnico pass into Noricum. It was the seat of a bishopric; its importance is attested by the remains of a basilica.
The first bishop whose memory has been preserved is a certain IANUARIUS in 490; a MAXENTIUS is mentioned at the end of the 6th century. PAUL THE DEACON (Hist. Lang., VI, 51) recalls the two bishops FIDENZIO and AMATORE, who, under the protection of the Lombard duke, had established their see in Civitate (Forum Iulii), where there had been no bishop. AMATORE was driven out from there by CALLISTUS, patriarch of Aquileia. Later, the church of St. Peter on the mountain became the seat of a collegiate church with pastoral care over the entire But Valley.