Léonce-Eugène-Joseph Fabre des Essarts (19 March 1848 - 17 October 1917) was a French occultist, Symbolist poet, politician and theorist on Gnosticism and Esoteric Christianity.
Born in Aouste-sur-Sye, he became a Fourierist and pacifist as well as secretary of Louis Andrieux under Boulangism.
He was also deputy for Var as a republican-socialist, becoming friends with Victor Hugo and was crowned at the Jeux floraux in Toulouse as well as being involved in the administration of state education.
In 1900 he allowed Doinel to be re-admitted to the Church and re-consecrated bishop of Alet and Mirepoix under the name "Tau Jules".
He also founded a synarchist Masonic lodge and contributed to the occultist review L'Initiation.