According to a legend the building started on the order of Peter the Great. Already in 1711 there were consecrated the side-altars, and in the 1717 - the main altar. The cathedral itself is a double lighted quadrangle, covered with an octagonal vault and crowned with two reducing octagons and a dome. The wide semicircular frontons of the central part of facades - so called semidomes - give a special expressivity to the skyline of the cathedral. Later this element was widely spread in Russian church architecture. The placement and the form of windows openings of the quadralgle repeat in general the scheme of facades of the first storey of the Church of Saint Nicholas in Troyekurovo. Perhaps the semidomes of Saint John the Warrior cathedral is the development of the concept of the semicircular fronton of the Troyekurov church. Refectory and bell tower are of the more traditional forms. The carved iconostasis of the main cathedral, dating of the beginning of the XVIII century, is brought from the demolished cathedral of