Fyodor Sologub (also known as Theodor Sologub; 1 March 1863 - 5 December 1927) was a Russian Symbolist poet, novelist, playwright and essayist. He was the first writer to introduce the morbid, pessimistic elements characteristic of European fin de siècle literature and philosophy into Russian prose. In 1892 he was finally able to relocate to the capital, where he got a job teaching mathematics, started writing what would become his most famous novel, The Petty Demon, and began frequenting the offices of Severny Vestnik, which published much of his writing during the next five years.