Which of Paul's letters were written from Rome under house arrest?
The letters written from Rome under house arrest are Ephesians, Philippians, Colossians, and Philemon. These four are known as the prison epistles because Paul was literally in prison, though it was a house arrest rather than a dungeon. He wrote them during that period.
Les teaches that four years after writing Romans, Paul wrote from Rome while in prison under house arrest. The letters composed there are Ephesians, Philippians, Colossians, and Philemon. The next year, while still in Rome and under house arrest, these are called the prison epistles, because he was literally in prison, but it was not a dungeon—it was a house arrest. This fits the timeline of his letters, with the Thessalonian letters first about AD 54, then Galatians in 58, 1 Corinthians in 59, 2 Corinthians about AD 60, and Romans the same year.