This article presents results of studies conducted in three historic parks of Greater Poland. The aim of the research was to analyze changes in the original composition of those objects and to identify the causes of its destruction. The selected parks are of baroque origin but due to changes in garden art trends they were transformed into establishments of landscape character. The analyzed residential – park complexes are characterized by a varying degree of destruction to their original spatial arrangement. The conductedanalyses made it possible to identify what factors were destructive to the composition of the chosen objects and to determine further threats.