The village of Będzin originated in the 9th century. The local wooden fort, that the records show existed as early as the 11th century, was destroyed during the Tatar invasion in 1241 and subsequently rebuilt.
During the reign of Casimir III the Great the castle received an upgrade from wooden fortress to a stone one, and the stone fort was operational as early as in 1348. The growing trading village of Bytom was given Magdeburg Law city rights shortly afterwards, in 1358.
The castle was meant to be a military outpost on the southwestern border of the Kingdom of Poland (later, the Polish-Lithuanian Commonwealth). It was the most westward fortification, and was meant to hold off any invasion coming to Lesser Poland from Bohemian or Silesian lands. In 1364 the castle was visited by Charles IV, Holy Roman Emperor. In 1588, Maximilian III, Archduke of Austria, was held prisoner in here, after his defeat in the War of the Polish Succession (1587–1588).
The castle fell into disrepair in the late 16th century. The fire of 1616 and damage during The Deluge in 1657 resulted in the further destruction. The fortress was periodically repaired, but due to shifts in the layout of the borders and relations between Poland and its neighbours, it lost much of its importance. After the partitions of Poland, Będzin fell into Prussian control and the castle became property of the Hohenzollern family. In 1807, the nearby lands were transferred to the Duchy of Warsaw, and in 1815, to the Congress Poland. In 1825 the castle was virtually falling apart, and when a piece of the stone crushed a passerby, demolition of the castle was ordered, but before it was started, the castle was declared a monument. In the 1830s the castle was bought by Count Edward Raczyński and partially rebuilt, with a Protestant church temporarily housed inside, but after Raczyński's death in 1845 plans to open an academy or a hospital there were abandoned, and the castle once again fell into disrepair.
The castle was not rebuilt again until the times of People's Republic of Poland, when in 1952–1956, a museum was opened there.
The castle became the site of a museum, Zagłębie Museum in 1956. The museum has several collections: one of armament, from medieval to World War II times; second dedicated to the history of the Będzin Castle; third to the castles of the other nearby castles founded by Casimir the Great (Eagle Nests Trail or Szlak Orlich Gniazd) and the final one, to the military history of the Będzin region.
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.