Abstract
My contribution will turn to the theme of Thomas Aquinas and religions, in particular to some criteria that we can draw from his doctrine to guide the dialogue between religions. For this reason, we will ask ourselves what is a religion for St. Thomas. Then we will highlight the intrinsic link between religion and human nature. With this analysis we will be able to sketch the elements that contribute to the truth of religion and the truth in religion. Finally, in conclusion, we will summarize some elements that serve the dialogue between religions, according to Saint Thomas.