Castle of the Dukes of Alba was founded in the 12th century when King Ferdinand II of León ordered to build a simple watchtower. In the 13th century, King Sancho IV of Castile converted the primitive tower into a castle. It was devastated by the battles of the time of King Henry IV of Castile but later rebuilt and converted it into a private palace.
In its interior you can visit several rooms, such as the one that houses the mural paintings of the Battle of Mühlberg.
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.