Esslingen Castle has been the city’s most recognizable landmark for almost 700 years. It was built originally in the 13th century and enhanced in 1519-1531. Preserved elements in the Old Town of the corresponding city wall include the Schelztor, the Pliensauturm and the Wolfstor. The castle is open to the public, and the famous Dicke Turm has also recently reopened for visits by guided tours. The ascent of more than 300 steps rewards visitors with a unique view over the city.
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.