The presence of immovable cultural heritage in contemporary living environment defines the spirit of the place, enriches the cultural landscape and could play a key role in the urban fabric – important goals for preservation of the historical layers in our cities. The modern approach to the preservation of cultural values includes not only conservation and restoration activities but also complementary actions for adaptation of the objects necessary for their protection and the restoration of their role in the contemporary urban structure.
In search of methods for giving a complex unprejudiced assessment, the modern science is trying to systematize and unify criteria for evaluation of cultural values and the admissibility of the intervention.
Over the years preservation activities led to different systems of criteria considered in various documents – both international charters and documents at national level, but little has been done for organizing them into a common methodology for intervention.
These problems are considered in the legal framework of the Bulgarian legislation in two key documents – the Law of Cultural Heritage and Ordinance № N -12, which specifies that the classification and categorization of objects and preparing the final evaluation are based on the criteria for cultural value. These criteria outline the general direction for the survey and analysis of the author of one project, but are not sufficiently specific and depend largely on the author’s personal appraisal