[2] The first bishop whose date is known with certainty is Eutychius, who was present at the dedication of the Basilica of Monte Gargano in 493.

[3] Until the end of the 10th century, Trani had followed the Latin Church and it's liturgies,[4] and Bishop Bernardo[5] opposed the decree of the Patriarch Polyeuctes (968) introducing the Byzantine Rite;[6] it is uncertain whether Joannes, bishop of Trani, who embraced the schism of Michael Caerularius and in consequence was deposed by Pope Nicholas II (1059), belonged to the Greek Rite.

Samarus was granted the lordship of the Jews of Trani by Emperor Henry VI for his support against Tancred.

In 1860 the See of Nazareth (Barletta) was united with Trani, the archbishop of which had been appointed in 1818 perpetual administrator of the see of Bisceglie.

With the See of Trani is united the ancient diocese of Salpe (Salapia of the Greeks), its known bishops comprising Palladius (465) and 23 successors before the definitive union in 1547.