The author of Romans is the Apostle Paul (1:1). The authorship was not debated, as the writing style, theology and historical facts all align with Paul and what we know of him through other sources. Paul’s audience was the church at Rome (1:7). Most of the church was made up of Gentiles, but Paul mentions Jews being a part of the congregation as well.
Paul likely wrote Romans from Corinth in A.D. 57 during his third missionary journey. He gathered an offering from different churches for the poverty stricken Christians in Jerusalem.
Paul has several key teachings in Romans. Most significant was his explanation of salvation for all of mankind (Jew and Gentile). Several passages in Romans develop the concept of salvation (5:8, 6:23, 10:9-10). Paul emphasizes the idea of justification by faith. Paul reminds his readership we are all sinners and are in need of God’s grace and righteousness in our life.