This document provides background information on Paul's first letter to the Thessalonians. It discusses the letter's origin in the 50s CE from Corinth to the church in Thessalonica. It outlines the political climate of persecution against Jews and early tensions between Paul and the Jewish community that caused him to leave Thessalonica. The major themes Paul discusses are the return of Christ, life after death, love within the Christian community, and freedom from sin through responsible living. The legacy of Paul's letter is that Thessaloniki remains a populated city in Greece with a majority Christian population today.