1) The city of Thessalonica was founded in the 4th century BC and became the capital of Macedonia when it became a Roman province. It had a large Jewish population and was influenced by Greek thought.
2) Paul wrote 1 Thessalonians to the church in Thessalonica in the early 50s AD from Corinth to encourage them in their hope for Christ's return amid suffering and persecution. He commended them for their faith, love, and hope.
3) The Thessalonians imitated Paul and the apostles by receiving the gospel with power despite affliction and became examples to others by loudly proclaiming the word. Their repentance from idols impressed all who heard.