The Pauline epistles, Epistles of Paul, or Letters of Paul, are the thirteen New Testament books which have the name Paul (Παῦλος) as the first word, hence claiming authorship by Paul the Apostle. Among these letters are some of the earliest extant Christian documents. They provide an insight into the beliefs and controversies of Early Christianity and, as part of the canon of the New Testament, they have also been, and continue to be, foundational to Christian theology and Christian ethics. Usually they are placed between the Book of Acts and the Catholic epistles. In minuscules 175, 325, 336, and 1424 the Pauline epistles are placed at the end of New Testament.