Sponheim Castle is a medieval ruin in Burgsponheim on the edge of the Hunsrück mountain range. From the 12th century it was the original residence of the Counts of Sponheim. Significant portions of the castle remain standing.
The castle stands on a crag, approximately 250 meters long, around which the Ellerbach stream, a tributary of the Nahe, flows on the south and east sides. The ruin is on the peak of the crag, which is roughly 150 meters high.
The castle was probably already built in the 11th century and is first mentioned in two documents of 1127. In the 12th century it was extended and became the residence of the Counts of Sponheim. Upon the partition of the county in the early 13th century, the castle lost its importance, becoming the seat of comital ministeriales. The existence of a castle chapel is documented in an indulgence dated 1300.
When the ruling male line of the Rhenish branch of the House of Sponheim became extinct in 1437, the castle became a joint jurisdiction of the Margraves of Baden and the Counts of Veldenz, whose territories were inherited by Count Palatine Frederick I of Simmern in 1444 and held by the House of Palatinate-Zweibrücken. In the Thirty Years' War the castle was besieged by Spanish troops under Ambrogio Spinola in 1620, which may have caused some destruction.
Within a ring wall, the castle comprised a residential section, a round tower, and a strongly fortified rectangular keep, provided for habitation purposes with privy, enlarged windows, and fireplaces. The keep was constructed of rough-hewn stone and dates roughly to the mid-12th century. Other towers with rough-hewn masonry are found only south of the River Nahe.
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.