Theologian of the Pontifical Household

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 Apostolic Palace (Latin: Magister Sacri Palatii Apostolici) before the changes implemented in Pope Paul VI's 1968 apostolic letter Pontificalis Domus.

In 1218 St. Dominic was the first papal theologian to be given the title "Master of the Sacred Palace". Eighty-four Dominicans succeeded him until the early 20th century. Eighteen of them were later named Cardinals, twenty-four archbishops or bishops (including some of the cardinals), and six were elected Superior generals of the order. Several are famous for their works on theology, e.g. Durandus of Saint-Pourçain, Juan de Torquemada, Sylvester Mazzolini 'Prierias', Thomas Maria Mamachi and Giuseppe Agostino Ors. The majority were Italians, ten Spaniards, ten Frenchmen, one German, and one an Englishman (William de Boderisham, or Bonderish, 1263–1270?).

The chronicles of the churches of San Domenico at Perugia and San Domenico at Orvieto attest that the studium at the convent of Santa Sabina, which is the forerunner of the Pontifical University of Saint Thomas Aquinas, Angelicum, played the special role of frequently providing papal theologians from among its members.

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