Located on the southern coast of the Sea of Marmara, in modern-day Mudanya, this ancient settlement was known by various names throughout its history, including Brylleion, Myrleia, Apamea, and during the Roman Empire, Col. Iulia Concordia. These name changes reflect the city's strategic location and its successive subjugation by different civilizations, making it one of the significant port cities of the Propontis region.

History

The history of ancient Brylleion/Myrleia/Apamea/Col. Iulia Concordia may extend back to the 7th century BCE on the shores of the Propontis (Sea of Marmara), but its exact foundation date remains uncertain. The city's first known name, Brylleion, is likely associated with the local Bithynians. Later, during the Hellenistic Period, it was known as Myrleia, thought to have been developed or renamed by Milesian colonists. During this period, the city became an important center of Hellenistic culture and trade.

In the 3rd century BCE, the city came under the influence of the Seleucid Empire and was renamed "Apamea" by Seleucid King Antiochus I Soter in honor of his mother, Apama. This renaming underscored the city's strategic and political importance for the Seleucids. Apamea became a symbol of Seleucid control in the region and played a key role in maritime trade. With the transition to Roman rule, in the 1st century BCE, particularly during the time of Julius Caesar or Augustus, the city gained the status of a Roman colony and was named "Colonia Iulia Concordia." This status reinforced the city's military and administrative importance for the Roman Empire, ensuring it became a strong representative of the Roman presence in the region. This long and multi-layered history demonstrates the city's continuous development as a settlement and its central role in the strategies of various empires.

Geographic Location

Ancient Brylleion/Myrleia/Apamea/Col. Iulia Concordia is situated in a strategic location on the southern coast of the Propontis (Sea of Marmara), where the modern district of Mudanya now stands. This geographical position provided the city with a natural harbor, enabling it to serve as both a hub for maritime trade and a bridge between the sea and the Anatolian interior. The city acted as a gateway to the fertile lands of the Bithynian region, particularly connected to the surrounding olive groves and agricultural areas.

Thanks to its position on the Propontis, it became an important stopping point on the maritime trade routes between the Black Sea and the Aegean Sea. Neighboring cities included Cius (Gemlik) to its east, Prusa ad Olympum (Bursa), an important center, to its south, and Nicaea (İznik) further inland. Apamea functioned as one of the main ports connecting these inland cities to the sea, thereby playing an indispensable role in the regional economy. The naturally sheltered structure of its harbor allowed ships to anchor safely, increasing the city's commercial appeal.

Significance in Antiquity

Brylleion/Myrleia/Apamea/Col. Iulia Concordia held great economic and political significance in antiquity. Economically, as one of the busiest ports on the Propontis, it played a central role in the export of Bithynia's rich agricultural products (olive oil, wine, grain) and timber. It also served as an important distribution center for goods arriving by sea and destined for inland regions. These commercial activities increased the city's prosperity and made it one of the driving forces of the regional economy.

Its political importance is highlighted by the city's constant change of hands between different powers. Its strategic position for Hellenistic kingdoms, the Seleucids, and ultimately the Romans demonstrates how critical the city's military and administrative control was. Its acquisition of colony status (Colonia Iulia Concordia) during the Roman Empire was a result of Rome's desire to consolidate its dominance in the region and directly control this important port. This status granted the city certain privileges and Roman citizenship, while also making it a significant center of Roman administration in the area. Religiously, it is probable that the city housed temples dedicated to local Bithynian deities, gods from the Greek pantheon such as Poseidon and Demeter, and the Imperial cult during the Roman period, though concrete archaeological evidence is limited.

Coinage

No coins from this settlement are recorded in the NumisTR database. Despite its existence under various names throughout history, such as Myrleia, Apamea, and Colonia Iulia Concordia, there are no numismatic records or archaeological findings indicating that it struck its own coins. This suggests that the city's economic activities were primarily conducted through coins issued by neighboring major cities or regional mints, or that it was dependent on imperial coinage during the Roman Empire.

Archaeological Remains

Due to its location beneath the modern district of Mudanya, visible archaeological remains of ancient Brylleion/Myrleia/Apamea/Col. Iulia Concordia on the surface are quite limited. The density of modern settlement has led to a large part of the ancient city remaining underground or being destroyed over time due to construction. However, during construction work or salvage excavations in and around Mudanya, small finds such as architectural elements, pottery fragments, inscriptions, and coins from different periods can be encountered.

Particularly given its status as a port city, there is a possibility of finding remnants of ancient harbor structures or submerged pier fragments. Future systematic archaeological excavations or underwater research are expected to uncover different layers of the city, providing more information about its rich history, spanning from Hellenistic Myrleia to the Roman colony of Col. Iulia Concordia.

Today

The settlement where ancient Brylleion/Myrleia/Apamea/Col. Iulia Concordia was located is today the district of Mudanya, part of Bursa province. Mudanya continues its existence as a modern port city on the coast of the Sea of Marmara. Known for its historical fabric and natural beauty, Mudanya is a popular destination for both locals and tourists. Easily accessible from Istanbul by sea buses and from Bursa by road, Mudanya continues to be an important center, preserving its strategic location since antiquity.