 Riccio was a prolific writer and, as Heinrich Graetz says, "turned to good account the small amount of Jewish knowledge which he brought with him to Christianity".His best-known work is his "De Porta Lucis R. Josephi Gecatilia" (Augsburg, 1516), which is a free translation of a part of the Kabbalistic work "Sha'are Orah" by Joseph Gikatilla.Jerome Riccio (Hieronymus Ricius), Paulo's son, sent a copy of this work to Johann Reuchlin, who utilized it in the composition of his "De Arte Cabbalistica".