This book lists the manuscripts related to the 'De Auxiliis' Controversy that are preserved in Rome. This dispute is one of the episodes in Spanish intellectual history with the greatest international resonance, if we take into account the commotion caused in Rome and the secular repercussions it will have within the Catholic and even Protestant sphere. This theological controversy also involves highly topical concepts that attract the interest of contemporary philosophers. This book contains a complete list of the manuscripts preserved (...) in Rome, trying to relate them to each other and to point out which are the most reliable and valuable sources. This involves the description of a considerable number of manuscripts that had not been described in any catalogue until now, and the identification of some unknown works. In addition, several unpublished letters by Domingo Báñez and Luis de Molina are transcribed here. (shrink)