Boyana Church is a medieval Bulgarian Orthodox church situated on the outskirts of Sofia. In 1979, the building was added to the UNESCO World Heritage List.
Boyana Church was built in three stages: in the late 10th to early 11th, the mid-13th, and the mid-19th centuries. The oldest section (the eastern church) is a small one-apse cross-vaulted church with inbuilt cruciform supports. It was built in the late 10th or the early 11th century.
The frescoes in this second church, painted in 1259, make it one of the most important collections of medieval paintings. The ensemble is completed by a third church, built at the beginning of the 19th century. This site is one of the most complete and perfectly preserved monuments of east European medieval art.
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.