During Paul's second missionary journey, Acts records a vision in which a man of Macedonia appealed to him to cross over and help. Paul and his companions concluded that God had called them to preach the gospel there.
They traveled to Philippi, where Lydia and her household became believers and Paul and Silas were imprisoned after the deliverance of a slave girl. Following a miraculous earthquake, the Philippian jailer and his household also believed.
Paul continued through Macedonia to Thessalonica and Berea. Churches established in these cities remained important throughout his ministry.
Paul later praised the generosity of the Macedonian Christians, particularly in connection with the collection for believers in Jerusalem.