The basic assumption of this project is that some of Aristotles views a re present in the work of both Cornelius Jansenius and Libertus Fromondu s in spite of the Augustinian context of their work or rather in close a nd complex relationship to it. Janseniuss Augustinus (1640) and Fromond us Brevis anatomia hominis (1641) are particularly studied here in orde r to show that Aristotles ideas had a bearing especially on particular concepts such as habitual grace, contingency or sufficient/efficient gra ce in Jansenius and Fromondus. Moreover, it is explained that Aristotle is present in these scholars works through scholastic authors such as A quinas and Scotus often quoted by both Jansenius and Fromondus. Furtherm ore, the reception of Aristotle in Jansenius and Fromondus is presented as multi-layered, depending also on numerous other theologians/philosoph ers such as Luis de Molina, Francisco Suárez or Leonardus Lessius, whom Jansenius and Fromondus criticised for their Aristotelian views on gra ce. It is actually against these Jesuit scholars that both Jansenius and Fromondus often discuss Augustines views on grace and the salvation of the soul. The Jesuits are polemically identified both as allegedly Aris totelian and as allegedly Pelagian and criticised by both Jansenius and Fromondus for corrupting Augustines views on grace due to their Arist otelian views on virtue, which determine them to assert pure nature and free will against the necessity and irresistibility of grace. It seems, thus, that Aristotles and Augustines reception were tightly interconnected when grace and free will were at issue in the seventeenth -century Louvain. The fact that both the Aristotelian treatises on Logic and the Methapysics, the Physics and the Nicomachean Ethics were quoted and discussed by both Jansenius and Fromondus proves that Aristotles w ork was well known and studied in depth even if often criticised due to its interference with Augustines views on grace. The fact that both Jan senius and Fromondus, who wrote his book in support of Jansenius, quote almost the same works and passages in almost the same contexts and refer ring to the same issues may prove indeed that Aristotle was important in this Augustinian context of the seventeenth-century Louvain. It may als o prove that Fromondus was inspired by Jansenius ideas and work. The po lemic accents in Jansenius Augustinus against the Aristotelian and P elagian Jesuits are indeed still present in Fromondus Brevis anatomia hominis. However, the thorough knowledge of Aristotle that Fromondus dis plays and his attempt to offer a synthesis of Augustines and Aristotle s views qualifies such a supposition to a certain extent.