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 are foundational texts for both Christian theology and ethics.