Trajanopolis has been variously identified; Radet locates it at Çarikköy, about three miles from Giaurören towards the south-east, on the road from Uşak to Suzusköy, a village abounding in sculptures, marbles and fountains, where the name of the city may be read on the inscriptions. However, Ramsay continues to identify Trajanopolis with Giaurören. Modern scholars place it near Ortaköy.
It was founded about 109 by the Grimenothyritae, who obtained permission from Roman emperorHadrian to give the place the name of his predecessor. It had its own coins. Hierocles calls it Tranopolis.
The Roman Empire and its administrative divisions, ca. 395. For a more detailed version, see this map.
Another, doubtless more ancient than the preceding, Demetrius, is known from one inscription.
The bishopric of Trajanopolis is included in the Catholic Church's list of titular sees, as the diocese was nominally restored in the 17th century as a titular bishopric, initially as just Traianopolis, renamed since 1933 Trajanopolis in Phrygia, thus avoiding confusion with its Thracian namesake (in Roman province Rhodope).
It is vacant, having had the following incumbents, of the lowest (episcopal) rank, with a singular archiepiscopal exception :
Jerónimo Zolivera (1672.02.22 – 1683.01.11)
Juan José de Aycinena y Piñol (1859.04.15 – 1865.02.17)
Giulio Marsili, Friars Minor (O.F.M.) (1873.11.11 – 1873.11.11)
Adam Carel Claessens (1874.06.16 – 1884.01.04) as Apostolic Vicar of Batavia (Java, Indonesia) (1874.06.16 – 1893.05.23), emeritate as Titular Archbishop of Siraces (1884.01.04 – 1895.07.10)
Tomás Jenaro de Cámara y Castro, Augustinian Order (O.E.S.A.) (1883.08.09 – 1885.03.27)