The Ducal Rotunda of the Virgin Mary and St Catherine is Znojmo's most valuable monument, and features one of the oldest fresco in the Czech lands. Particular importance of this painting is that besides the religious motives it displays also the praising portrayal of the ruling Přemyslid dynasty.
The painting was commissioned by Konrad II of Znojmo on the occasion of his wedding with Mary, daughter of Uroš of Serbia in 1134. Apart of the donor couple, Konrad and Mary, the identity of the other depicted members of the dynasty is disputed among the historians. With two exceptions being the Přemysl the Ploughman, the legendary ancestor of the dynasty, and Vratislaus I, the first King of Bohemia.
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.