Joseph-Antoine Boullan
Abbé Joseph-Antoine Boullan was a French Roman Catholic priest who was later laicized, and was often accused of being a Satanist although he continued to defend his status as a Christian.
He was a friend and inspiration of the writer Joris-Karl Huysmans. Huysmans with Henri Antoine Jules-Bois supported Boullan in a celebrated occultist feud with the Marquis Stanislas de Guaita.
Boullan is mentioned in The Prague Cemetery, the novel by Umberto Eco.