The Romanescue style Marka Church was built in the late 1100s or early 1200s. The sacristy was added later in the Middle Ages. The original tower was demolished in 1750 and the new wooden belfry was completed in 1752. The great bell date from the year 1583 and the small one from 1751. The altarpiece date from the late 17th century as well as the Baroque-style pulpit.
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.