An interesting person indeed:
Charles-François Dupuis (1742-1809) wrote an important text about the origins of all cultes. Dupuis argued that ancient rituals in Syria, Egypt and Persia had influenced the Christian story which was allegorized as the histories of solar deities, such as Sol Invictus. He argued also that Jewish and Christian scriptures could be interpreted according to the solar pattern, e.g. the Fall of Man in Genesis being an allegory of the hardship caused by winter, and the resurrection of Jesus an allegory for the growth of the sun’s strength in the sign of Aries at the spring equinox.
Volney argued that Abraham and Sarah were derived from Brahma and his wife Saraswati, and that Christ was related to Krishna. Volney published before Dupuis but made use of a draft version of Dupuis’ work, and followed much of his argument, but at times differed from him, e.g. in arguing that the gospel stories were not intentionally created as an extended allegory grounded in solar myths, but were compiled organically when simple allegorical statements were misunderstood as history.