The Kaštieľ National Cultural Monument with its area declared in 1963. It consists of several monuments.
The manor. Originally a Renaissance manor house built before 1570. It was modified before 1609, in the first half of the 17th century, around 1708 and in 1765-1783. Classically rebuilt in 1816, stylistically unified and re-façade in the Gothic-Renaissance historicist style in 1924. It has a two-wing layout, a four-wing closed floor plan, a three-storey building with a basement and an arcaded courtyard. The solitaire is located in the center of Hajná Nová Ves 132.
The park. Natural-landscape English park with historic greenery from the first half of the 19th century in the middle of the village. It was modified before 1904 and in 1980-1981. It has an irregular floor plan. In the park there is a pseudo-Romanesque chapel from the 19th century and many kinds of rare trees.
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