Gabriel Wagner (c. 1660 – c. 1717) was a radical German philosopher and materialist who wrote under the nom-de-plume Realis de Vienna. A follower of Spinoza and acquaintance of Leibniz, Wagner did not believe that the universe or bible were divine creations, and sought to extricate philosophy and science from the influence of theology. Wagner also held radical political views critical of the nobility and monarchy.