Itelmen people of the Kamchatka Peninsula have felt and experienced the influence of the Russian Orthodox Church for over 300 years. Explorers' reports tell us that at the same time that Itelmens rebelled violently against the tsar's representatives, they accepted and appropriated the power of the church. This article examines religiosity in Itelmen history as it is revealed through a critical approach to sources, especially by focusing on Itelmen actions. Missionaries and ethnographers' preconceptions gave shape to their depictions of Itelmen religious beliefs and practices as (1) Christian beliefs, (2) anathema to Christian beliefs, or (3) mere superstitions. In order to speak about Itelmen perceptions, the article focuses primarily on actions taken during this early period of recorded Itelmen history and on the writers who showed an interest in describing how Itelmens thought about religious questions. The article also recounts the little known story of the 1848 Kutkh rebellion.