The construction of the Teutonic Castle in Dzierzgoń began in 1248, as ordered by the national champion Heinrich von Wida. At its location there was chosen towering hill over the area, where previously was a fortified city of Prussia, to protect the settlement lying at its feet. The fort was the seat of the Commander of Dzierzgoń, who also held the function of the Quatermaster (Obersttrappier) in the Order of the Teutonic Knights. During the heyday of the Teutonic Order Dzierzgon castle was considered to be in possession of the largest arsenal of weapons comparing to Malbork castle and the second largest Brodnica granary.
During the war of Polish and Teutonic Knights between 1409-1411, the the Dzierzgoń's monks took part in the battle of Grunwald, under the leadership of Commander Albrech von Schwarzburg. Their commander was killed in combat.
By the way of Polish forces at Malbork, the Polish King Władysław Jagiełło entered Dzierzgon and stayed at the castle. Here the King received a delegation from the Prussian towns, including Elbląg, which gave him a tribute of fidelity. In 1411 the castle was conquered by the Teutonic Knights. 42 Commanders served their role at the Dzierzgoń castle, among many of them later became the great masters of Teutonic Order. The Poles burned down the castle in Dzierzgoń twice during the war with the Teutonic Knights in 1410 and 1414. Under the peace treaty of Toruń in 1466, the castle was returned to Poland, becoming the seat of the mayor and the municipal court.
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.