The article attempts to investigate the history of the construction of the Intercession Cathedral in the city of Okhtyrka, Sumy region, which was built in 1753–1768 during the Ukrainian Baroque era. Studying new documents from various archival funds helped reveal changes in the plans of this sacred building aimed at observing the Ukrainian tradition of a three-story church. It is shown that the artistic decoration of the cathedral continued in the 19th century, and the masters of carving, sculpting, wall painting, etc., performed their work without the participation of the architect, which did not interfere with the integrity of the artistic decision. It is confirmed by archival photo documents of the general appearance and interior design of the temple, which are introduced to the scientific circulation for the first time. Some names of the masters who worked on the artistic design of the cathedral in different periods of its history before the Soviet era have been identified and introduced into scientific circulation. Emphasis is placed on the unique regional stylistic features of this Sloboda Ukraine landmark of the Ukrainian Baroque era. An analysis of its condition during Soviet times, when it was used as a wine-vodka warehouse, is accompanied by corresponding photos, which are presented for the first time. In the description of the current state of the Cathedral, already used for divine services, for the first time a number of photos are given, fixing the results of the reconstruction. The need to create a unified state management system for the protection of cultural monuments is emphasized, which is especially relevant under modern conditions, when the aggressor country of the Russian Federation, having attacked Ukraine, mercilessly destroys the objects of our cultural heritage. It is emphasized that due to the lack of state support, local communities, which are trying to restore a sacred building abandoned during the Soviet era, are unable to create a comprehensive program of reconstruction or restoration, and therefore resort to stylization according to a certain historical era, losing their relevance to the individual uniqueness of the artistic image of the lost monument, as can be seen on the example of the reconstruction of the Holy Intercession Cathedral, Okhtyrka. The results of the study have the prospect of continuation and can be used in the future to match the lost identical image of this important sacred monument for Ukrainian culture.