The town of Leopoldov was founded in 1664-1669 as a fortress against the Ottoman Turks on the initiative of Emperor Leopold I (hence the name). It was granted town status in 1669. The fortress has served as a state prison since 1855. During the Communist Czechoslovakia, the Communist government used the prison for holding and liquidating political prisoners, particularly in the 1950s. The conditions were harsh for prisoners, and the prison was one of the most notorious in the former Czechoslovakia. Among the inmates was Gustáv Husák (from 1954 to 1960), who would be later communist president of Czechoslovakia. The prison was modernized and reconstructed in the second half of the 20th century. Before 1989 there were approximately 2,600 inmates in the prison. As of 1990, it was the biggest prison in the present-day Slovakia.
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.