The Ducal Castle in Szczecin was the seat of the dukes of Pomerania-Stettin of the House of Pomerania (Griffins), who ruled the Duchy of Pomerania from 1121 to 1637. Barnim the Great of Pomerania-Stettin erected the castle within Szczecin's walls against the will of the burghers in 1346. An older Pomeranian burgh had been leveled in 1249. In 1490 the castle was partially reconstructed for Boguslaw X's wedding with Anna Jagiellonka (daughter of king Casimir IV Jagiellon).
Between 1573−1582 the castle was rebuilt again, this time in the mannerist style for duke John Frederick by Italian stonemasons according to design by Wilhelm Zachariasz Italus. Two new wings were added to close the courtyard before the medieval southern and eastern wings. The main gate was adorned with ducal crest, the eastern wing was enhanced and the northern wing was intended for chapel.
In 1648, due to the tenets of the Peace of Westphalia, the castle become a seat of Swedish governor. Before 1705 another reconstruction occurred to prepare the castle for Queen of Poland - Catherine Opalinska, who lived here with her daughters Anna and Marie Leszczynska (future Queen of France) and a small court between 1705-1711. In 1711 king Stanislaw Leszczynski, who sought refuge before chasing him Saxon and Russianforces, joined his wife and daughters at the castle.
After the Great Northern War, in 1720, the city of Szczecin become a Prussian property and the castle was allocated to the garrison commander Christian August, Prince of Anhalt-Zerbst, whose daughter was Sophie Friederike Auguste (future Catherine II of Russia). Under Prussian rule in the 19th century many renaissanse elements in the castle were devastated (arcades, attics, vaulting). Eventually about 60% of the castle was destroyed during World War II (August 1944). Shortly after the war between 1958–1980, it was rebuilt with some modifications. The castle was restored to its original 16th century appearance according to 1653 engraving by Matthäus Merian (among others).
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.