The Čertovy hlavy ('The Devil Heads') are a pair of 9 metre high rock sculptures in the municipality of Želízy in the Central Bohemian Region of Czech Republic.
Čertovy hlavy were created by Václav Levý in 1841-1846. In terms of dimensions, it is a unique work in the Czech Republic. They are the second largest carved heads in the world, after the carvings of Mount Rushmore in the United States.
The sculptures have been damaged by time and weather. In 2011, the private owner had the surrounding pine forest cut down, allowing the heads to be seen from the I/9 road. Further sandstone reliefs can be found near the Čertovy hlavy, known as Harfenice ('Harpist') and Had ('Snake') reliefs.
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.