Around 800 AD, a chapel is said to have been built on the site of current Saaleck Castle. The origins of the castle remain unclear. It was first mentioned around 1030 by a historian from the nearby Homburg, which was being extensively expanded at the time.
Significant expansions were made in the 13th century. Abbot Heinrich von Erthal (1249–1261) completed the fortifications, adding ditches, walls, and battlements. The neck ditch was deepened, and the shield wall was reinforced. Over the following centuries, the castle was continuously worked on. Even Ulrich von Hutten once paid 50 guilders to renew a wooden bridge over the southern neck ditch.
Originally, Fulda's southernmost stronghold played an important role in the region. The castle was strategically located and was significantly strengthened during the time of Abbot Marquard I.
After the Thirty Years' War, Salentin von Sintzig rebuilt the castle as his retirement residence. According to his reports, the castle was in a very ruined state at the time, with large stones being taken away by locals for their own construction purposes. From 1644 to 1667, he meticulously rebuilt the entire complex. Before the Peasants' War, the castle had lost its military importance and had fallen into ruin. It had not suffered significant damage from wars or fires until the outbreak of the war, when it was suddenly occupied and devastated by rebels.
About 100 meters below the castle lies the upper end of the chapel's way of the cross from the Altstadt Monastery.
Today, the castle, or Schloss Saaleck, is protected as a landscape-defining historical monument.
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.