Mysionis was a large ancient town and fortress. It is located 7 km away of town of Targovishte in region Krumovo Kale, on the northern edge of the steep gorge of the river Vrana in Preslav Mountains.
The site dates back to 6th-7th centuries. After excavations there were found remains of fortress walls 3-4 meters in height, remains of a large church, guard and residential buildings. The slopes of the hills were occupied of neighborhoods and in one of them was found a second large Christian church.
In the vicinity were found also marble columns, antique stone objects, Roman pottery, medieval cemeteries and others. Probably Mysionis existed until the end of the 14th century and was destroyed during the Ottoman invasion.
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.