Jesus Church is one of the largest and most important Protestant churches in Poland. The construction of the Lutheran basilica was made possible with the assistance of Sweden's Charles XII, who forced Austrian Emperor Joseph I to provide right for Protestants. Late Austrian Baroque in style, Jesus Church was constructed between 1709-1710 and the bell tower was erected in 1750. In the first two decades of the church's existence, it was a significant center of pietism.
The church has a capacity of 6000 people (sitting on benches) and a lot of standing places if necessary. The Church also houses the Protestant Museum altogether with Tschammer Library which has about 23 000 books in its collection.
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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.