Diocletianopolis in Palaestina (Ancient Greek: Διοκλητιανούπολις) was a city near Ascalon. It was given the status of a city under the name Diocletianopolis as part of a Roman policy of urbanization, what had been the territory of Ascalon was divided into three municipal districts, those of Ascalon, Maiumas, and Diocletianopolis. Ken Butcher says that what was given the name Diocletianopolis was the port of Ascalon.
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History
This arrangement occurred probably in the reign of Diocletian (284–311). so that the city of Diocletianopolis then belonged to the Roman province of Syria Palaestina. In about 390, it became part of the newly created province of Palestina Prima, which had Caesarea in Palaestina as capital.
Diocletianopolis was also called Sarafia a name that survives in the present name of Khirbat al-Sharaf or Khirbat al-Ashraf and that Christians seem to have preferred to the official name that recalled the persecuting emperor.
Ecclesiastical History
Diocletianopolis was a Christian episcopal see by the mid-4th century, but the only bishop of the see who is known by name is Eliseus, who took part in the Semi-Arian synod of Seleucia in 359.
Titular see
No longer a residential diocese, the bishopric is today listed by the Catholic Church as a titular see.
The diocese was initially (18th century?) restored nominally under the name Diocletianopolis, only in 1933 the titular bishopric was renamed Diocletianopolis in Palæstina.
It is vacant, having had the following incumbent, all of the lowest (episcopal) rank :