Alexander Fyodorovich Labzin (Александр Фёдорович Лабзин; 1766–1825) was a leading figure of the Russian Enlightenment who developed an idiosyncratic mystical system and founded an influential St. Petersburg masonic lodge, . His wife was a noted memoirist. Labzin revived the tradition of Novikov's "libertine" magazines with "The Messenger of Sion", a religious monthly that celebrated a "religion of the heart" and rebelled against the ritualistic side of Orthodox worship. The magazine was attacked by the church officials led by Archimandrite Photius and was discontinued.