The Zamoyski Entail was the 4th entail to be created in the lands of the Polish-Lithuanian Commonwealth. Its establishment is associated with Jan Zamoyski, Chancellor and Grand Crown Hetman. The Zamoyski family became the owners of the estates through its inheritance and purchase. They also erected their own residences, surrounded by park complexes. For example Klemensów founded by the 7th entailer Tomasz Zamoyski, Różanka on the Bug River with the no longer existent palace or the palace and park in Adampol, which currently houses a tuberculosis hospital. The purpose of the presented article is to present representative buildings of palace and park complexes of the entail as well as their spatial transformations especially resulting from defragmentation of garden complexes during the agrarian reform and the transition period. The research also analyses changes in ownership of palace and park complexes and their evolving functions. The article also attempts to describe the greatest threats, along with their characteristics and impact on the historic gardens belonging to the former Zamoyski Entail.