EN
The author draws attention to the particular significance of a thorough distinction of factors shaping the conditions that influence murals, prior to the setting up of conservation programmes concerning historical objects. Mentions is made of the necessity for extensive control of buildings decorated with polychromy, and their surrounding. The article places emphasis on the importance for the durability of the object of the awareness on the part of its administrators of the consequences of planned repair and installation undertakings. This pertains especially to control of the existing and newly introduced heating, sewage, thermal insulation, anti-dampness and drying systems as well as others, which exert a long range impact upon changes in the conditions of the surrounding of murals. The attention of conservators should be also attracted to all preparations introduced in the course of conservation and repair into brick constructions and wooden elements of edifices, as well as their subsequent assessment from the point of view of future effects for the polychromy. This task belongs to the duties of conservators of murals to a degree much larger than in cases of transferable objects. Finally, the author stresses the importance of those factors in the training of conservators since a superficial approach renders the effects of conservation short-term.