13 books of the New Testament are traditionally attributed to the Apostle Paul: Romans, 1 Corinthians, 2 Corinthians, Galatians, Ephesians, Philippians, Colossians, 1 Thessalonians, 2 Thessalonians, 1 Timothy, 2 Timothy, Titus, and Philemon.
The authorship of some of these letters is disputed by modern scholarship; the traditional attribution places all 13 under Paul's name.