Dominating the southern side of Tito Square is the imposing Praetorian Palace, which has served as the municipal seat for some eight centuries. Its Venetian Gothic design dates from the middle of the 15th century, with the outer staircase and balustrade added fifty years later, and the overall appearance of the façade taking shape in 1664 after significant renovations. After serving various purposes following the downfall of the Venetian Republic at the hands of Napoleon in 1797, the building underwent a decade long restoration in the 1990s and now once again serves as the municipal seat and mayor's office, as well as the Tourist Information Centre.
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.