Pionia () or Pioniai (Πιονίαι) was a town in the interior of

ancient Mysia Mysia (UK , US or ; ; ; ) was a region in the northwest of ancient Asia Minor (Anatolia, Asian part of modern Turkey). It was located on the south coast of the Sea of Marmara. It was bounded by Bithynia on the east, Phrygia on the southeast, Lyd ...

, on the river Satnioeis, to the northwest of

Antandrus Antandrus or Antandros () was an ancient Greek city on the north side of the Gulf of Adramyttium in the Troad region of Anatolia. Its surrounding territory was known in Greek as (''Antandria''),Aristotle, ''Historia Animalium'' 519a16. and inclu ...

, and to the northeast of

Gargara Gargara () was an ancient Greek city on the southern coast of the Troad region of Anatolia. It was initially located beneath Mount Gargaron, one of the three peaks of Mount Ida, today known as Koca Kaya (). At some point in the 4th century BCE t ...

. Under the Roman dominion it belonged to the jurisdiction of

Adramyttium Adramyttium ( ''Adramyttion'', Ἀδραμύττειον ''Adramytteion'', or Ἀτραμύττιον ''Atramyttion'') was an ancient city and bishopric in Aeolis, in modern-day Turkey. It was originally located at the head of the Edremit Gulf, G ...

, and in the ecclesiastical notices it appears as a

bishopric In church governance, a diocese or bishopric is the ecclesiastical district under the jurisdiction of a bishop. History In the later organization of the Roman Empire, the increasingly subdivided provinces were administratively associate ...

of the Hellespontine province. The bishop Aetius represented the city at the

Council of Ephesus The Council of Ephesus was a council of Christian bishops convened in Ephesus (near present-day Selçuk in Turkey) in AD 431 by the Roman Emperor Theodosius II. This third ecumenical council, an effort to attain consensus in the church th ...

. No longer the seat of a residential bishop, it remains a

titular see A titular see in various churches is an episcopal see of a former diocese that no longer functions, sometimes called a "dead diocese". The ordinary or hierarch of such a see may be styled a "titular metropolitan" (highest rank), "titular archbi ...

of the

Roman Catholic Church The Catholic Church (), also known as the Roman Catholic Church, is the List of Christian denominations by number of members, largest Christian church, with 1.27 to 1.41 billion baptized Catholics Catholic Church by country, worldwid ...

. Its site is located near

Gömeniç Gömeniç is a neighbourhood in the municipality and district of İvrindi, Balıkesir Province, Turkey. Its population is 156 (2022). The village is at an altitude of 287 m (941 ft) above the Sea of Marmara. The village is 27 km from Balıkesir ...

in Asiatic Turkey.

References

Populated places in ancient Mysia Former populated places in Turkey Catholic titular sees in Asia History of Balıkesir Province {{Balıkesir-geo-stub