Columbia subject headings:
Church history--Primitive and early church, ca. 30-600.
Paul, the Apostle, Saint.
Harvard subject headings:
Bible. Epistles of Paul--Criticism, interpretation, etc.--History--Early church, approximately 30-600.
Paul, the Apostle, Saint--Teachings.
Princeton subject headings:
Bible. Epistles of Paul--Theology.
Paul, the Apostle, Saint
Theology, Doctrinal--History--Early church, ca. 30-600.