The Gate of Spalen (Spalentor) is a former city gate in the ancient city walls of Basel. One of the three remaining gateways, it is regarded as one of the most beautiful gates of Switzerland.
In October 1356, a major earthquake destroyed the old Basel. Then local people surrounded their newly built city with a high city wall and a moat in front of it. The ring wall had over 40 towers and seven of them were gate towers like the Spalentor (completed in 1473-74).
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.