First mentioned as a fortified complex in 1125 and used as a chapel, Bürgeln was built by local land-owner Lord Werner von Kaltenbach, who subsequently donated all his possessions to the St. Blasien Benedictine monastery. Under monastic control, Bürgeln became the seat of the St. Blasien Provost, the religious representative and church tax collector for the local area, including the convent at Sitzenkirch and the nearby communities of Obereggenen and Marzell. During the peasant's revolt of 1525 the castle was looted. Then in 1556 Charles II Margrave of Baden-Durlach, in whose territory Bürgeln sat, introduced the Reformation, releasing the local communities from the control of the Catholic monastery and its Bürgeln Provost.
In 1689, during the War of the Spanish Succession, the property was severely damaged, and between 1692 and 1698 was left uninhabited. There were several attempts to restore it, but in 1762 the former structures were demolished down to the foundations, and over the next two years Bürgeln was rebuilt as a 'Schloss' - equivalent to an English stately home - designed to represent Catholic power in the midst of a Protestant stronghold.
At the beginning of the 19th century, with revolutionary France ascendant and the Austrian rulers of the Catholic Holy Roman Empire defeated, imperial possessions were secularised. Initial attempts in 1803 to transfer St. Blasien to the Catholic Order of Malta based in Heitersheim were resisted, but following further Austrian defeats at Ulm and Austerlitz in 1805, large swathes of Austrian Breisgau were transferred over to the Electorate of Baden.
In 1809 Bürgeln was sold into private ownership. By 1926 Bürgeln had come into the possession of Richard Sichler who renovated the property, adding the terrace on the west side. After his death in 1952, his widow stayed on at the house until 1957, when it was sold to the current owners, the Schloss Bürgeln Association, though the sale did not include the contents, which were sold off separately.
Today the house, authentically refurnished, with a restaurant on site and set in small but beautifully laid out gardens.
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.