Baianism is a term applied to the school of thought of Catholic theologian Michael Baius (1513-1589). Its foremost apologists, Baius among them, largely claimed this school and its teachings to be a return to a sort of Augustinianism, against the reliance on Scholasticism and Scholastic writings which held sway over most Catholic theologians at the time. It is the immediate historical predecessor of Jansenism, and, as with Jansenism, has been deemed non-orthodox by the Catholic Church.