The Via Egnatia was perhaps the most important military and commercial road in antiquity. It connected the Adriatic coast with the eastern Mediterranean, the Black Sea, and Asia.
It passed through Philippi, forming the city's main street (see above), and remains of it are also attested in the greater Philippi region. It passed by the Battlefield of Philippi beneath the surviving triumphal arch, and upon exiting the city it crossed the eastern cemetery and then head to Neapolis (modern- day Kavala), the colony's harbour.
Construction of the Roman Via Egnatia in Eastern Macedonia dates to the second half of the 2nd century BC as is attested by a bilingual milestone that mentions the name of the road's builder: Gnaeus Egnatius, (son of) Gaius, Proconsul of the Romans. It played a vital role in the fortunes of the Roman, Byzantine, and Ottoman empires for more than 2,000 years.