Demetrius of Rostov (, , secular name Daniil Savvich Tuptalo, , or Tuptalenko, , according to some sources; 11 December 1651 28 October 1709) was a leading opponent of the Caesaropapist reform of the Russian Orthodox church promoted by Theophan Prokopovich. He is representative of the strong Cossack Baroque influence upon the Russian Orthodox Church