The monograph discloses the trends of Lithuanian architectural masonry restoration and reconstruction, explores the problems of scientific validity in Lithuanian masonry architecture heritage management and the problems of the amount of authentic information, and, in accordance with international provisions, provides the assessment of heritage management work under performance. The problems are revealed on the basis of the analysis of examples of Lithuanian masonry architecture heritage. The monograph also seeks for the reasons that determined the development of a distinctive concept of historical building restoration and reconstruction.