Gripsholm Castle is regarded as one of Sweden's finest historical monuments. A fortress was built at the location around 1380 by Bo Jonsson Grip, and belonged to his family until the confiscation of mansions and castles by King Gustav I in 1526. The King tore it down, and built a fortified castle with circular corner towers and a wall, for defensive purposes. Of the original medieval fortress, only the façade of a wall remains.
Since Gustav Vasa, Gripsholm has belonged to the Swedish Royal Family and was used as their residence until 1713. Between 1563 and 1567, King Eric XIV imprisoned his brother John and his consort Catherine Jagiellon in the castle. This was also one of the castles that King Eric was imprisoned in when John had overthrown him. John's son Sigismund, later the King of Poland and Sweden, was born in the castle on June 20, 1566.
The castle was again used as a prison between 1713 and 1773, before it was renovated by King Gustav III on behalf of his consort Sophia Magdalena. A theater was also added in one of the towers at this time.
Between 1889 and 1894, the castle underwent a heavy and controversial restoration by the architect Fredrik Lilljekvist during which many of the 17th and 18th-century alterations were removed. The largest change was the addition of a third floor; the planned demolition of a wing did not take place.
Today the castle is a museum which is open to the public, containing paintings and works of art. Part of the castle houses the National Collection of Portraits (Statens porträttsamlingar), one of the oldest portrait collection in the world.
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.