Elchingen Abbey was a Benedictine monastery in Oberelchingen. For much of its history, Elchingen was one of the 40-odd self-ruling imperial abbeys of the Holy Roman Empire and, as such, was a virtually independent state that contained several villages aside from the monastery itself. At the time of its secularisation in 1802, the abbey covered 112 square kilometers and had 4000-4200 subjects.
Dedicated to the Virgin Mary and Saints Peter and Paul, the monastery was founded by the Counts of Dillingen in 1128. The abbey was one of the very few that enjoyed Imperial immediacy (independent of the jurisdiction of any lord and answering directly to the Holy Roman Emperor, and thus a territorial principality in its own right). The abbot sat in the Reichstag of the Holy Roman Empire.
Like all the other imperial abbeys, Elchingen lost its independence in the course of the secularisation process in 1802-1803 and the monastery was dissolved. By 1840 the buildings had been almost entirely demolished. In 1921 the Missionary Oblates of Mary Immaculate settled on the site. Today the abbey church remains.
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.