Roman Catholic Diocese of Civita

Its first historical mention is in 594, when Pope Gregory the Great invites its Metropolitan, the Archdiocese of Cagliari, to nominate a candidate for the vacant see.

Its first documented incumbent, bishop Victor, was mentioned in a papal letter in 599, recalling his work to evangelize the pagan locals, and attended a synod in Rome in 600.

The see of Phausania is still listed in the Byzantine Notitia Episcopatuum until circa 1000; but this may well have been a refusal to canonically acknowledge the diocese being effectively wiped much earlier, plausibly in the 8th century by Arab invaders.

The see was exempt, i.e. directly dependent on the Holy See (not part of any ecclesiastical province, just as the region's second bishopric, the Diocese of Galtellì, which may have been founded as late as 1113, when the (remainder?)

In 1138, the papal bulla Tunc apostolicae sedis, from Pope Innocent II, made both suffragan of the Metropolitan Archdiocese of Pisa on the Italian peninsula (and capital of the dogal state which colonized part of the island), but it seems both were rendered exempt again later in that century, unlike the other three giudicati, where Metropolitans of their own were established.