Thessalonica: The Free City of Macedonia Where Paul Preached Three Sabbaths

The Ancient City

Thessalonica was founded around 315 BC by Cassander, one of the successors of Alexander the Great, who gathered the inhabitants of some twenty-six smaller settlements at the head of the Thermaic Gulf into a single new city. He named it for his wife Thessalonike, a half-sister of Alexander. The site was chosen well: a sheltered harbour on the Aegean, fresh water from the hills of Chortiatis, and a natural corridor northward up the Axios (Vardar) valley into the Balkan interior.

When Rome dissolved the Macedonian kingdom in the second century BC, Thessalonica became the seat of Roman administration in the region, and from 146 BC it served as the effective capital of the province of Macedonia. Its greatest strategic asset was the Via Egnatia, the great Roman highway that ran from the Adriatic coast across Macedonia and Thrace toward Byzantium. Thessalonica sat astride this road, roughly at its midpoint, and grew wealthy on the traffic that moved along it.

In 42 BC, after the battle of Philippi, the city was rewarded for having supported the victorious side in the Roman civil wars with the status of a free city (civitas libera). This meant that Thessalonica was self-governing: it kept its Greek civic institutions, struck its own coins, and was administered not by Roman colonial magistrates but by its own officials, called politarchs. In the first century AD it was the largest and most important city of Macedonia, with a mixed population of Greeks, Romans, and a Jewish community large enough to maintain a synagogue — a detail that mattered greatly for what follows.

The politarchs deserve particular attention. The title appears in Acts 17:6 and 17:8 (the Douay-Rheims renders it "the rulers of the city") and for a long period was unknown from classical literature, which led some nineteenth-century critics to question the accuracy of the Acts account (Scholarship). Archaeology settled the matter: the term politarches has now been found in a substantial number of inscriptions from Macedonia, several from Thessalonica itself. The best known stood on the Vardar Gate, a Roman arch at the western entrance to the city, which was demolished in 1876; its inscription, listing six politarchs by name, is preserved in the British Museum (Scholarship). The precision of the title is widely cited as evidence of the author of the Acts of the Apostles using accurate local knowledge.

Paul in Thessalonica

Paul reached Thessalonica on his second missionary journey, around AD 49-51 (Scholarship). It is worth recalling how that journey began: Paul set out from Antioch and "went through Syria and Cilicia, confirming the churches" (Acts 15:41, Scripture) — a route that passed through his native Tarsus and climbed the Cilician Gates, the mountain pass north of the city. The long road that eventually brought the gospel to Macedonia thus began in Cilicia, in the country of Paul's birth. From Anatolia, Paul, Silas, and Timothy crossed to Europe at Troas, preached at Philippi, and then travelled westward along the Via Egnatia.

Acts describes the arrival plainly: "And when they had passed through Amphipolis and Apollonia, they came to Thessalonica, where there was a synagogue of the Jews" (Acts 17:1, Scripture, Douay-Rheims). Amphipolis and Apollonia were the staging towns on the Egnatian road; the sequence in Acts matches the geography exactly.

According to Acts 17:2-4 (Scripture), Paul followed his custom and reasoned in the synagogue for three sabbaths, arguing from the Scriptures that the Christ had to suffer and rise from the dead. Some of the Jews believed, together with a great multitude of devout Greeks and a number of prominent women. The mission may in fact have lasted longer than three weeks: Paul's own letters recall that he worked "night and day" at his trade so as not to burden anyone (1 Thessalonians 2:9, Scripture), and that the church at Philippi sent him support at Thessalonica more than once (Philippians 4:16, Scripture) — details that suggest a stay of some months (Scholarship).

The mission ended in civic disturbance. Opponents gathered a crowd and attacked the house of Jason, Paul's host, and when they did not find the missionaries they dragged Jason before the politarchs, crying that "these all do contrary to the decrees of Caesar, saying that there is another king, Jesus" (Acts 17:7, Scripture, Douay-Rheims). In a free city whose privileges depended on Roman goodwill, an accusation of proclaiming a rival king was serious. The politarchs took security from Jason and released him, and the brethren sent Paul and Silas away by night to Berea (Acts 17:10, Scripture). From Berea, Paul went on to Athens and then to Corinth.

The church he left behind flourished. From Corinth, most scholars hold around AD 50-51, Paul wrote 1 Thessalonians — regarded by many as the earliest surviving Christian document and possibly the oldest book of the New Testament (Scholarship). In it he could already say of the Thessalonians that "from you was spread abroad the word of the Lord, not only in Macedonia, and in Achaia" (1 Thessalonians 1:8, Scripture, Douay-Rheims). Thessalonica also gave Paul lasting co-workers: Aristarchus and Secundus, named among his travelling companions in Acts 20:4, and Aristarchus again on the voyage to Rome (Acts 27:2, Scripture).

What Remains Today

Thessalonica is one of the few Pauline cities that has never ceased to be a major city, and this continuity cuts both ways. The living city preserved the church's memory without interruption, but it also means the first-century town lies buried beneath more than two millennia of later building. There is no open archaeological park of Paul's Thessalonica comparable to the ruins of Philippi.

What the visitor sees instead are layers. The excavated Roman Forum (ancient agora) in the city centre, with its odeon and cryptoporticus, dates mainly to the second century AD — later than Paul, but on the civic ground the earlier city used (Scholarship). Stretches of the city walls survive impressively, largely in their late Roman and Byzantine form on Hellenistic foundations. The Arch of Galerius and the Rotunda, landmarks of the modern city, belong to the early fourth century. The line of the Via Egnatia is fossilised in the modern Egnatia street, which still carries traffic along roughly the ancient axis. The Vardar Gate with its politarch inscription is gone, as noted, but the inscription survives in the British Museum, and the Archaeological Museum of Thessaloniki holds inscriptions, coins, and sculpture that document the Roman city Paul knew.

Christian tradition in the city is dense, though its great monuments — the basilica of Saint Demetrius, the church of the Acheiropoietos, the mosaics of the Rotunda — are of later, Byzantine centuries (Tradition).

Visiting Context

Thessaloniki is today the second-largest city of Greece and a natural anchor for travel to the Pauline sites of Macedonia. The Roman Forum, the Arch of Galerius, the Rotunda, the walls, and the Archaeological Museum all lie within a walkable city centre. Philippi to the east and Berea (modern Veria, where a modern "Bema of Saint Paul" monument marks the traditional site of the apostle's preaching, Tradition) to the west are commonly visited from the city, allowing the traveller to follow Acts 16-17 in geographical order along the Via Egnatia corridor.

For readers of this library, Thessalonica marks the moment the gospel took root in a great European metropolis — the far end of a road that, for Paul, had begun in Tarsus and the passes of Cilicia. Its story is best read alongside the atlas and the survey of Paul's second missionary journey, and against the background of early Christianity in the Greek East.