The thesis deals with the diversity of tree composition and the condition of park objects in the district of Bánovce nad Bebravou, but also with the evaluation of the spontaneous spread of invasive trees. After a thorough reconnaissance of the area, 15 park buildings were found in the district, which were located in 12 villages and 1 in city. The most important park buildings include the historic park in the village of Šišov and the remains of a historic building in the village of Uhrovec. These park buildings are also the oldest and the best preserved, and therefore there were also the most dendrometrically interesting trees. The establishment of park buildings dates back to the middle of the 19th century. The other park buildings were created after the Second World War and a few of them were created after 1990. In the district of Bánovce nad Bebravou, I registered the spontaneous spread of woody plants in 6 species. Robinia Pseudoacacia L. was one of the most intensively spreading species.