sentences:  Said pre-approved dissertation is usually expected to relate and complement the doctorate candidate's ongoing field of work.As with the Doctor of Sacred Theology (STD = "Sacrae Theologiae Doctor") issued by the pontifical university system of the Roman Catholic Church, which builds upon the work of the Bachelor of Sacred Theology (STB) and the Licentiate of Sacred Theology (STL), the PThD also necessitates the completion of both a bachelor's degree and a Master of Arts degree in a field of ministry training.The PThD, however, is meant to enhance further the teaching, preaching, and leadership effectiveness of the current pastor/overseer of a congregational ministry, while the STD graduate is usually expected to seek the professorate in a Catholic university—see "Sapientia Cristiana" on Ecclesiastical Universities, Part One, Section VII, Article 50. n.1 at .