under stanislav august ponitowski, major renovations were made to the palace. sejm of the polish-lithuanian commonwealth took place here. later, the palace passed to the military department of the russian empire. at first, a cadet corps was located here, and then a military hospital. in 1991 year the palace was transferred. its main building and left wing are occupied by a museum. now the new castle has a permanent exhibition and temporary exhibitions. the exhibition new castle, events and fate introduces the history of the construction of the new castle and the significant events that took place here. the exhibition “the ancient monuments of ponemonia” tells about the history of the grodno region. history of the grodno region in the 19th-20th centuries. grodno region during the years of the great fatherland. exhibitions of sacred art, rescued valuables, weapons of past centuries represent the museum’s collection of icons decorative and applied arts, paintings, weapons, and expositions of the fauna and flora of the grodno region, the amazing world of nature , i