EN
Despite considerable progress made by the conservation of stone monuments, we still observe an accelerated disintegration of monuments which had been subjected to conservation. The cause of this phenomenon could lie in work conducted by amateurs and the application of unsuitable methods or measures by professional conservators. The article discusses the impact of the professional level of conservators upon the correct execution of their work, and postulates the legal protection of the profession of the conservator of historical monuments (as is the case in the medical profession). The author criticises such operations as the removal of the outer layers of stone surfaces, their desalination and structural reinforcement. The article mentions methods and measures which are judged correct or incorrect from the point of view of a permanent protection of stone monuments from further damage. The author is convinced that permission to use assorted factory-made aids should be given by appropriate agencies upon the basis of tests conducted by a suitable institute.