In 1274, a moated defense tower was built on the site of today's Oberau castle. The specialty of this residential tower is the internal stairs and the external living rooms. In 1550, Ernst von Miltitz had an impressive, elongated new building built in the Renaissance style with accentuated gable tops next to the residential tower. In 1594 the building was thoroughly redesigned to create a renaissance castle.
In the 17th century painted wooden ceilings were installed in the castle, but their boards were used in a different way from 1807. The painting was retained. In 1803 the construction of Oberau Castle was restored. Valuable stucco work was created during this construction work. In the period from 1807 to 1878, the manor received its form that is characteristic of today. At the beginning of this period in particular, the castle got its striking appearance. Traditions from the end of 1853 tell of a single bridge - probably a drawbridge - that led across the moat to the castle. In 1860 the northeast wing was built, the style of which was adapted to the existing parts of the building. This gave the castle an angular floor plan and aneo-Gothic stair tower.
After the end of the Second World War, displaced persons were quartered in the castle. The entire building was occupied from the basement to the roof. After some families moved away, some rooms were rebuilt. In the period that followed, ten displaced families still found accommodation in the castle. These conversions were later also used by a children's home. As there was not enough space for the children's home, plans were made to demolish the castle. The demolition is delayed, however, as the resettlement families still lived in the castle. In 1946 the manor building was redesigned so that it could be used for other purposes. The large palace gardens were also significantly affected by the renovations.
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.