Alexandria Troas was founded near the Aegean coast of the Troad around 310 BCE by Antigonus I Monophthalmus, one of Alexander the Great’s successor generals. He gathered residents from several neighboring communities into a new city called Antigoneia. After Antigonus was defeated and killed in 301 BCE, Lysimachus took control and renamed the settlement Alexandria in honor of Alexander. A large walled territory, productive hinterland, and access to sea routes allowed the new foundation to compete with older cities of northwestern Anatolia.

The city’s harbor connected western Asia Minor with Macedonia and the northern Aegean. Under the kingdom of Pergamon and then Rome, Alexandria Troas became an important commercial and transit center. Augustus established or reorganized it as a Roman colony, granting privileges that encouraged monumental construction and a strongly Roman civic identity. Ancient writers sometimes treated the city as a possible counterpart to Rome because of its association with the legendary Trojan homeland, although plans to make it an imperial capital belong more to tradition than confirmed policy.

Alexandria Troas prospered during the first and second centuries CE. An aqueduct improved the water supply, and a vast bath-gymnasium complex was built with support from the wealthy Athenian benefactor Herodes Atticus during the reign of Hadrian. A theater, odeon, temples, streets, and public buildings served residents and travelers, while harbor installations handled regional and long-distance trade. The surviving scale of the city walls and baths reflects resources far greater than the scattered rural setting around the ruins today suggests.

The port appears several times in the New Testament. Paul passed through Troas during his missionary journeys, experienced the vision calling him toward Macedonia, and later returned to the local Christian community. Acts describes a gathering at which a young man named Eutychus fell from an upper window and was restored after Paul went to him. Alexandria Troas later became a bishopric. These associations gave the city a lasting place in Christian geography even as commerce and population declined during late antiquity and the Byzantine period.

After abandonment, stone from Alexandria Troas was reused locally and shipped for major building projects elsewhere, leaving impressive structures broken and overgrown. Archaeological work has documented the walls, bath-gymnasium, podium temple, theater, roads, aqueduct, and harbor, but much of the city remains unexcavated. The site records the deliberate creation of a Hellenistic city, its reinvention as a Roman colony, and its role as a maritime bridge between Anatolia and Europe. Its sparse modern surroundings make the surviving foundations especially important for reconstructing the scale of the lost port.