Střekov Castle (Schreckenstein) is perched atop a cliff above the River Elbe, near the city of Ústí nad Labem. It was built in 1316 for John of Luxembourg, the father of the Holy Roman Emperor Charles IV, to guard an important trade route to Germany. After changing hands several times, the castle was acquired by the Lobkowicz family in 1563. Its strategic importance led to occupations by Imperial Habsburg, Saxon, and Swedish forces during the Thirty Years' War, as well as successive sieges by Austrian and Prussian armies during the Seven Years' War.
Although Střekov Castle was heavily damaged during those conflicts and abandoned as a military installation by the end of the 18th century, the 1800s saw many poets and artists visiting the castle, drawn by a new trend of interest in romantic ruins. Goethe declared the view from the castle's position above the Elbe to be the most beautiful in Central Europe, while Richard Wagner's opera Tannhäuser was supposedly inspired by his visit to Strěkov. The castle was confiscated by the Nazi regime and later the Communist government, but was restituted to the Lobkowicz family in the early 1990s.
Střekov Castle is divided into two sections connected by an arched bridge spanning a natural moat— an unusual style for the 14th century, when it was first built. The castle’s semiround bastions, inspired by French architecture, are possibly the first example of that type of defensive design in Bohemia. The connecting round tower, a smaller tower guarding the castle entrance, and an irregular oblong section of the castle date back to the very earliest period of construction.
References:Rosenborg Palace was built in the period 1606-34 as Christian IV’s summerhouse just outside the ramparts of Copenhagen. Christian IV was very fond of the palace and often stayed at the castle when he resided in Copenhagen, and it was here that he died in 1648. After his death, the palace passed to his son King Frederik III, who together with his queen, Sophie Amalie, carried out several types of modernisation.
The last king who used the place as a residence was Frederik IV, and around 1720, Rosenborg was abandoned in favor of Frederiksborg Palace.Through the 1700s, considerable art treasures were collected at Rosenborg Castle, among other things items from the estates of deceased royalty and from Christiansborg after the fire there in 1794.
Soon the idea of a museum arose, and that was realised in 1833, which is The Royal Danish Collection’s official year of establishment.