The Renaissance’s sources of Descartes’ method are discussed in this article. Main attention is paid to the cabbalistic principles of Ramon Lull’s "Short Art" and Brunian and Ramist art of memory. Descartes knew Lull’s art to which he reffered to in very derogatory terms. The same logical, Pythagorean, and cabbalistic principles of Lullism, however, became the basis for the art of memory of the Renaissance and for the natural magic of the Renaissance, which Descartes knew. The occult art of memory of the Renaissance is also considered. J. Bruno was a great follower of occult art of memory and of the system of Lullism. The art of Peter Ramus arises to counterpose the official Catholic system of memory and the occult art of memory in the Prot...