 The authors of the School of Salamanca used traditional tools to deal with the new situations they faced. Besides the overarching influence of Thomas Aquinas—who became a Doctor of the Church in 1567 and whose works Ignatius of Loyola had obliged the members of his newly founded Jesuit order to study diligently—they engaged with other medieval traditions, including the glosses to the Decretum Gratiani, Franciscan authors (especially John Duns Scotus and William Ockham), Jean Gerson and even Marsilius of Padua, a banned author who was not even allowed to be cited, but nevertheless had a considerable impact on the conciliarist debate. Scholastic authors made a creative, instead of philologically correct, use of their authorities, interpreting and explaining them in their own sense. Molina and Suárez even overtly criticized Thomas Aquinas and his understanding of law.