Radziwiłł Palace is a Late Renaissance palace in the Old Town of Vilnius. It had been the second palace of Radziwiłłs by importance in Vilnius and the largest one. It is likely that Mikołaj 'the Black' Radziwiłł"s wooden Vilnius mansion was on the same site, but the current building was constructed by the order of Janusz Radziwiłł from 1635 until 1653, according to the design by Jan Ullrich. The building fell in ruin after the Muscovite invasion 1655-1660 and remain mostly neglected for centuries. It was further devastated during World War I and only the northern wing of the palace survived. Eventually, it was restored in 1980s and a division of the Lithuanian Art Museum is located there today. A part of the palace is still in need of renovation today.
Being the only survived Renaissance palace in Vilnius it has features of the Netherlands Renaissance as well as Manneristic decorations native to the Lithuanian Renaissance architecture. Its original layout and symmetry of structural elements was distinctive to the palaces of the Late French Renaissance resembling that of Château de Fontainebleau and Luxembourg Palace in Paris.
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.