Exposition of the Old and New Testament, by John Gill, [1746-63], at sacred-texts.com
Thessalonica was a very large, populous, and flourishing city, it was "liberae conditionis", as Pliny says (a), a free city, and the metropolis of Macedonia; it was formerly called Halis (b), and had the name of Thessalonica given it by Philip king of Macedon, on account of his conquest of Thessalia, which this name signifies; and some say he gave this name to a daughter of his on that occasion, who was afterwards the wife of Cassander; who, others say, called this place by his wife's name (c), which before was Therme: its name with the Italians is Salonichi, and is now in the hands of the Turks, as all Greece is: here the Apostle Paul came after he had been at Philippi, and stayed about three weeks, and preached every sabbath day, and his ministry was blessed to the conversion of some Jews, a multitude of devout Greeks, and many of the chief women of the place, which laid the foundation of a Gospel church; to which the apostle wrote this epistle, and is the first of all the epistles he wrote: the occasion of it was this; the unbelieving Jews, vexed to see the apostle's success, raised a mob of the baser sort of people, and assaulted the house of Jason, where the apostle and his companions were; but Paul and Silas were sent away by night to Berea, which the rabble understanding, followed them thither; when Paul was sent as if he was going to the sea, but was conducted by the brethren to Athens, who gave orders that Silas and Timothy should come to him with all speed, as they did; and Timothy was sent back to Thessalonica to establish and comfort the young converts there; and returning with good news of their faith, and charity, to the apostle at Corinth, he sent them from thence this epistle, and not from Athens, as some have thought: the design of which is to encourage them under their afflictions and sufferings; to exhort them to stand fast in the Lord, to abide by his truths and ordinances, and to live an holy life and conversation, and to regard the several duties of religion, towards God and one another, and those that were set over them; and in it he instructs them concerning the resurrection of the dead, and the coming of Christ, articles of very great importance and concern: the writing of this epistle is placed by Dr. Lightfoot in the 51st year of Christ, and in the 11th of Claudius Caesar.