The Benedictine Territorial Abbey of San Michele Arcangelo has been existed at least from 1078 and was probably built in the 5th century. The benedictine Abbey Church (12th century), dedicated to St. Michael, has a notable portal and a Norman-style bell tower with mullioned windows. The Norman lord Humphrey of Hauteville and his son Rudolph made large donations to the abbey. In 1484, after joining the Benedictine Congregation of St. Giustina from Padua, the abbey was enlarged and restored in Renaissance forms.
Afterwards it decayed due to numerous wars ravaging the country in those years. Renewed starting from 1590, it received a cylindrical cupola in 1650. The monks abandoned the abbey in 1784.
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.