Lubcha Castle was a residential castle of the Radziwill family on the left bank of the Neman River at Lubcha near Navahradak. The castle was founded in 1581 as a fortified residence of Jan Kiszka, a powerful Calvinist magnate. It had timber walls, a single stone tower, and was surrounded by moats on three sides, the fourth side protected by the river. Lubcha later passed to Janusz Radziwiłł, Great Hetman of Lithuania, who expanded the castle by adding three stone towers. In 1655 it was taken and devastated by the rebellious Cossacks under Ivan Zolotarenko.
Only the barbican and one other tower were left standing after the Cossack incursion. The deserted estate changed owners several times, remaining untenanted until the mid-19th century, when a Gothic Revival palace was built on the grounds. The Lubcha estate suffered much damage during both world wars. The palace was reduced to a shell in 1914 and was remodeled into a school building by the Soviets in 1947.
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.