There is no general agreement as to the exact years that Paul wrote his letters but, based on the chronology of Acts of the Apostles, the genuine epistles are usually dated to between 48 and 62 CE.
Another view, based on the references to the collection that Paul spent so much effort and personal capital on achieving, is that the genuine letters were written between about 44 and 48 CE.
the church
prison letters, or the letters of Saint Paul
Letters or epistles.
christians
Saint Paul
Saint Paul is the best known.
Paul sent letters (epistles) to various Churches in the areas he served.
The new testament
I do not think so , as it was not clearly mentioned.
The consensus of scholars is that Romans, 1 Corinthians, 2 Corinthians, Philemon, Galatians, Philippians and 1 Thessalonians are genuine letters written by the apostle Paul. Ephesians, Colossians, 2 Thessalonians, 1 Timothy, 2 Timothyand Titus were written in Paul's name, but long after his death.
There is no Saint Paul chapter 20-21 in the Bible. The apostle Paul wrote several letters in the New Testament but none of them have 20 chapters
Paul wrote several epistles, or letters, in the Bible, but not a gospel. In fact, he does not seem to have known much about the life of Jesus of Nazareth and seems not to have regarded him as a person who had lived in the recent past.