This book is the first experience of creating stories of Church Slavonic language of modern times. History of changes in Church Slavonic is considered as a result of language policy and correlated with the events of the Church and civil history. The place of the Church Slavonic literacy in the linguistic situation of modern times, shows the continuity of the current debates on language services in relation to the language controversy of previous eras. Permission for scientific circulation a considerable amount of previously unknown sources, some of which are placed in the annex. The book is intended both for specialists involved in the history of the Church Slavonic and Russian literary language, church history and liturgics and wide range of readers interested in the problems of language services.