What is…
Apollonia
also known as: Apollonía
Ancient Greek: Ἀπολλωνία
This is the name of an ancient inland city of Macedonia located between Amphipolis and Thessalonica. It is located on the historical Via Egnatia, about midway between Amphipolis and Thessaloniki.
“Now when they [Paul and Silas] had passed through Amphipolis and Apollonia, they came to Thessalonica, where was a synagogue of the Jews” —Acts 17:1 KJV
Apollonia is about 36 miles from Thessalonica. The total distance between Amphipolis to Thessalonica is about 61 miles (98 kilometers) a walking distance of about 23 hours.
Archaeology
The ruins of this Apollonia are located near the modern city of Néa Apollonía (Νέα Απολλωνία) — also known as simply Apollonia, in the Thessaloniki region of Greece. In ancient times it was in the Mygdonia region of Macedon (Macedonia).