The New Castle in Grodno, Belarus is a royal palace of Augustus III of Poland and Stanisław August Poniatowski where the famous Grodno Sejm took place in 1793. New Grodno Castle is 116 metres above sea level.
The royal residence was built on the high bank of the Neman River at a little distance from the Old Grodno Castle which had suffered great dilapidation in the aftermath of the Swedish occupation in the early 18th century. The two castles are joined by a 300-year-old arch bridge.
The palace compound was designed by Carl Frederick Pöppelmann. Construction was carried out between 1734 and 1751 under the supervision of several other Saxon architects, including Johann Friedrich Knöbel and Joachim Daniel von Jauch.
Wikipedia https://en.wikipedia.org/wiki/New_Grodno_Castle
Official Website https://museum-grodno.by/
Coordinates 53°40'34.495" N 23°49'30.731" E