High Quality Content by WIKIPEDIA articles! In the Roman Catholic Church, Theologian of the Pontifical Household (Latin: Pontificalis Domus Doctor Theologus) is a Roman Curial office which has always been entrusted to a Friar Preacher of the Dominican Order and may be described as the pope`s theologian. The title was formerly known as the Master of the Sacred Palace (Latin: Pontificalis Domus Doctor Theologus) before the changes implemented in Pope Paul VI`s 1968 apostolic letter Pontificalis Domus.