Towards the end of his life, in 1562, Marroquin left in his will some funds to set up a school, the Santo Tomás de Aquino, where Grammar, Arts, Philosophy and Theology would be taught. The beneficiaries of this pious enterprise would be the children of poor Spaniards, given that they could not travel to cities (like Mexico) where the Royal Universities were. This will has been also interpreted by scholars as the origin of the University of San Carlos. However, the late priest had a clear idea of the difference between a school (i.e., a home for students, with or without classes) and a university (or General Study) where the students earned degrees. About this, historian John Tate Lanning tells that "his will is so well known that there are some scholars that have not even seen it and have already read a lot of things that are not there at all. Nowhere in his will Marroquín talks about any university, much less talk about his intentions to establish one..." On the other hand, what is documented is that major Pedro Crespo Suárez left in his will twenty thousand pesos to set up the classes for the university that is "in the works with the authorities".