The New Castle in Hrodna, Belarus is the royal palace of Augustus III of Poland and Stanisław August Poniatowski where the infamous Grodno Sejm took place in 1793.
The royal residence was built on the high bank of the Neman River at a little distance from the Old Hrodna 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 Friedrich 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. The palace was completed under the direction of Giuseppe de Sacco in 1789 and remained home for King Stanisław II August until 1797.
Used as a hospital and barracks throughout most of the 19th century, the palace was renovated by the Polish administration in the interwar period. Scarcely anything is left of the original fabric of the castle, whose refined Rococo detailing vanished during World War II. There followed a hasty and rather superficial refurbishing of the palace by the Soviets with a view to making it the headquarters of a local obkom.
A plaque on the wall of the palace commemorates the council of war held in the royal residence by Tadeusz Kościuszko on 30 October 1794.
References:The Clementinum is a historic complex of buildings in Prague. Until recently the complex hosted the National, University and Technical libraries, the City Library also being located nearby on Mariánské Náměstí. The Technical library and the Municipal library have moved to the Prague National Technical Library at Technická 6 since 2009. It is currently in use as the National Library of the Czech Republic.
Its history dates from the existence of a chapel dedicated to Saint Clement in the 11th century. A Dominican monastery was founded in the medieval period, which was transformed in 1556 to a Jesuit college. In 1622 the Jesuits transferred the library of Charles University to the Klementinum, and the college was merged with the University in 1654. The Jesuits remained until 1773, when the Klementinum was established as an observatory, library, and university by the Empress Maria Theresa of Austria.