The Church of the Holy Archangels Michael and Gabriel in Nesebar, Bulgaria, is a partially preserved medieval Eastern Orthodox church, built in the 13th or 14th century. As part of the Ancient Nesebar UNESCO World Heritage Site, it stands in the old town and has been under state protection since 1927. The church, with a cross-in-square plan, features three apses and a large narthex. Despite partial preservation, it remains culturally significant, boasting opulent external decoration characteristic of Nesebar's medieval religious architecture. The architectural style, opus mixtum, incorporates alternating rows of brickwork and stones in a chequered pattern.
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.