The defences of Kraków date back to the 13th century and consisted of a wall with 39 towers and 8 gates, surrounded by a moat. The Wawel Castle defended one end of the town, and the Barbican the other. Today you can still see the Castle and the Barbican, and a small section of the wall by St Florian's Gate.
But the site of the old wall has been replaced by a garden, The Planty, that encircles the city. As you walk around the garden you can still see fragments of the walls and the gates.
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.