There has been a wooden church in Källa since the 11th century. After it was destroyed by fire, and with increasing attacks from Baltic invaders, a new church of stone - with the aspect of a fortress - was constructed in stages was built in the 13th century. The two-storied construction, dedicated to St. Olav, was very unusual and made for defensive purposes.
The Källa Church fell into disrepair when a new church was built here in the nineteenth century, but has now been taken into the care of the National Heritage Board and is a major tourist attraction. The most valuable of the old Källa Kyrka's furnishings, including the 15th-century triptych carving and the pulpit from 1600, were moved to the new church.
In the churchyard many of the huge old flat gravestones date from the 1600's and 1700's. Older graves have been discovered from the 11th and 12th centuries.
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.