Erchless Castle was built in the 13th century by the Bissetts and it came into the hands of the Chisholms. It was remodelled in the early 17th century as an L-plan tower house and underwent further alterations in the 19th century with the addition of a Baronial-style wing in 1895. During World War II the castle was said to have been requisitioned by the military for use as a rest centre for staff employed in entertaining the troops.
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.