The diocese of Ilion (or Ilium) was an ecclesiastical jurisdiction in Asia Minor during Late Antiquity.
[1] Marinus, described as bishop of Ilion in Hellespontus, attended the First Council of Nicaea in 325.
[3] According to the emperor, Pegasius enthusiastically led him on a tour of the pagan temples of Ilion and the shrines of Hector and Achilles, even remarking that it was "natural that they should worship a brave man [Hector] who was their own citizen, just as we worship the martyrs.
"[4] The city declined after that date, but it may still have been a residential bishopric in the 10th century, when the Emperor Constantine VII mentioned a bishop of Ilion.
[5] Archaeological excavations have identified one church building in Ilion, in the lower city of the Roman phase Troy IX.