 The Jesuit priest Antonio Rubio stands out among the philosophers of the 16th century. Born in Spain, he established himself in New Spain from 1576 to 1600 and wrote a famous treatise of logic titled Lógica mexicana (1603). The University of Alcalá adopted Lógica mexicana as its primary logic textbook and many editions of an abridged version were printed in Europe. We know, for instance, that Descartes studied Rubio’s Lógica as a pupil in La Fleche. Rubio wrote other books in which he offered a complete course in philosophy but, while his works on natural philosophy were published, his work on metaphysics was not, perhaps due to the popularity of Francisco Suárez’s Disputationes metaphysicae (1597).