Final answer:
Paul was in Thessaloniki when he wrote the first Thessalonian epistle.
Step-by-step explanation:
Paul was in Thessaloniki when he wrote the first Thessalonian epistle. Thessaloniki was one of the cities in the Roman world to which the apostle Paul spread Christianity. He encountered the religious and cultural experience of the Greco-Roman world in cities like Ephesus, Corinth, Thessalonica, and Rome.