EN
Historic buildings subjected to post-1945 revalorization succumb to rapid damage. On the one hand, their state is the outcome of the impact of increased environmental pollution and on the other hand — of imperfect and insufficient conservation expertise in combining old and new technologies and material. Construction-conservation work dealing with historic objects erected with old techniques and traditional material (timber, differently baked bricks, natural and artificial stone, lime mortar, etc.) is conducted upon the basis of a new construction philosophy, resorting to novel techniques and material such as cement, reinforced concrete, paint,etc. In Poland, the progressing destruction of historic buildings conserved by means of new techniques and material has remained unexamined although long-term observations prove that such techniques do not always pass the test. In 1993-1995, a team established by the National Museum in Poznań and cooperating with the Poznań Polytechnic and Ateliers for Research and Conservation of Historical Monuments in Toruń prepared a complex programme for salvaging the Town Hall, based on interdisciplinary studies. The Programme assumes parallel conservation and implementation studies.