Kassian Dmitrievich Bogatyrets, or Kasyan Dmytrovych Bohatyrets (Rusyn and Russian: Кассиан Дмитриевич Богатырец; Ukrainian: Касіян Димитрович Богатирець; Romanian: Casian Bohatireț, Bohatereț, or Bohatyretz; November 5, 1868 – July 28, 1960), was an Eastern Orthodox priest, church historian, and Rusyn community leader in Bukovina. Born a national of Austria-Hungary, he studied theology and history, and served the parish of Sadhora. He drew the suspicion of Austrian authorities attention with his open support for Russophile politics, and was persecuted after visiting the Russian Empire in 1908. He was arrested during the first days of World War I and deported to Sankt Marien, then tried for sedition in Vienna. He was scheduled to be executed by hanging in early 1917, but was freed by a gen