The idea of ​ ​ creating a series of publications "Research and restoration of one monument" is connected not only with an art history or iconographic analysis of a cultural monument - it arose in the process of the work of restorers carried out by our Center. Any, always valuable, information that appears in the process of restoration is of interest not only to specialists - researchers and restorers. Restoration intervention provides a unique opportunity to become the owner of information about the life of the monument for many centuries, its restoration at different times and, moreover, reveals the author's handwriting, its characteristic features, that is, it makes it possible to conduct a comprehensive study combining classical historical and natural-scientific directions.