Ghazar Jahketsi, the Catholicos of All Armenians from 1737 to 1751, was a prominent theologian, poet and a figure secretly connected with the Armenian national-liberation movement. In his writings, Jahketsi worked out a rather inclusive conception of Armenian national ideology of the 17-18th centuries. This article, for the first time, analyzes the components and priorities of Jahketsi's ideology, inter alia, identifying its historical background and antecedents, including literary sources.