Gnatia, Egnatia or Ignatia (Greek: Egnatia) was an Ancient city of the Messapii, and their frontier town towards the Salentini. As Egnazia Appula it was a medieval bishopric, which remains a Latin Catholic titular see.
It is located near the modern Fasano, in Salento, the southern part of Puglia (Apulia) region in southern Italy.
The first settlement known in the place dates from the Bronze Age (15th century BC). In the 11th century BC it was invaded by the Iapyges, while the Messapic (another Iapyyg tribe) era of the town (as well as for the whole Salento) began in the 8th century BC, to end in the 3rd century BC, with the Roman conquest.
Under the Romans, it was of importance for its trade, lying as it did on the sea, at the point where the Via Traiana joined the coast road, 50 kilometers (31 mi) southeast of Barium (Bari). It was famed for its solar and fire cult, which was described by Pliny and ridiculed by Horace.
The city, an early bishopric (see below), was abandoned in the Middle Ages due to the spread of malaria in the area, or to Vandal and Saracen attacks, or even given the last blow by Holy Roman Emperor Louis II of Italy (who also conquered Bari on Byzantium in 871).
It is last explicitly mentioned by a Ravenna author about 700, and Benedictine historian Paul the Deacon mentions successor see Monopoli as eagerly contested between Byzantines and Longobards as late as 763.
The ancient city walls were almost entirely destroyed over a century ago to provide building material. The walls have been described as being 8 yards (7.3 m) thick and 16 courses high. The place is famous for the discoveries made in its tombs. A considerable collection of antiquities from Gnatia is preserved at Fasano, though the best are in the museum at Bari.
Tradition claims it was evangelized by the Prince of Apostles Saint Peter himself.
An episcopal see named Egnazia Appula was established probably before 400, a suffragan of the Archdiocese of Bari, but suppressed in 545, its territory being reassigned to establish the Diocese of Monopoli, possibly before the city itself was abandoned.
A bishop of (E)Gnatia, Rufentius, participated in the three-part Council of Rome, convened in the 501, 502 and 504 by Pope Symmachus I, and in the council called by Italy's Ostrogoth king Theoderic the Great to judge that Pope but which fully reinstated him.
Apparently the see was restored or the title retained, as three later bishops of Egnazia Appula were recorded, but other documents suggest these may be spurious; even if not, the see was (possibly again) suppressed later :
The city and bishopric were in decay since the sixth century Longobards (Lombard) invasion, but the time of its demise remains unclear.
The diocese was nominally restored only in June 2004, as a Latin titular bishopric, under the name Egnazia Appula (Italian), corresponding to Latin Egnatia (in Apulia) / Egnatin(us) in Apulia (Latin adjective).
So far it has had one incumbent, not of the fitting Episcopal (lowest) rank but of Archiepiscopal rank :
