Quarried out of the natural bedrock, The Temppeliaukio church is one of the most popular tourist attractions in the city; half a million people visit it annually. The interior walls are created naturally by the rock. The church was designed by architects Timo and Tuomo Suomalainen and opened in 1969. The interior was excavated and built into the rock but is bathed in natural light entering through the glazed dome. Due to its excellent acoustics the church is a popular venue for concerts.
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.