The Church of Saint Michael started its life in the end of the 15th century. A plaque at the door of its Gothic facade is dated 1484. It is believed that the church was commissioned by the Catholic Monarchs when they visited the city in 1484. Previously, the area was served by an old hermitage. Its construction, however, would last several centuries resulting in an excellent cathedral-like set where latest gothic elements and other ones typical from beginning and full renaissance and baroque.
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.