Denghoog is a Neolithic passage grave dating from around 3000 BC on the northern edge of Wenningstedt-Braderup on the German Island of Sylt. The name Denghoog derives from the Söl'ring Deng (Thing) and Hoog (Hill).
Denghoog is an artificial hill created in the 4th millennium BC on top of a passage grave. The hill today has a height of around 3.5 metres and a diameter at the base of around 32 metres. The internal chamber is ellipsoid, measuring about 5 metres by 3 metres. Its roof is supported by twelve large boulders. The space between them is covered by dry stone walls made up of so-called Zwickelsteine. Three huge boulders, weighing around 20 metric tons each, form the roof of about 75 cm thickness. These stones are glacial erratics, carried here in the ice age from Scandinavia. The spaces between the roof stones are also filled with dry stone walling. A layer of firm blue clay, brought here from the eastern side of the island, mixed with stone fragments almost completely waterproofs the roof. Above this is a layer of yellow sand, covered by a final layer of humus.
A passage of six metres length and a height of one metre leads into the chamber. Several other stone blocks were found scattered around the base of the hill. These have been interpreted as the remains of a stone circle on top of the hill.
The hill was first opened for archeaeological research in 1868 by Ferdinand Wibel, a professor of geology. He found an undisturbed grave chamber that was divided in three sections.Wibel found a complete pottery jar and shards of 24 other vessels, 11 of which could be reassembled or completed. The largest of these, a Schultergefäss has a height of 38 cm and a diameter of 31 cm. Other burial objects included stone tools (hatchets, chisels, 20 flint blades, a pyrite bulb for making fire and two circular holed discs with a diameter of 10 to 12 cm. There were also six amber pearls (one of them labrys-shaped) and fragments of a seventh pearl. All of these findings are today exhibited at the Archäologisches Landesmuseum in Schloss Gottorf, in Schleswig.
By its shape and ornamentation, the pottery found inside the tomb indicates a date between 3200 and 3000 BC. It is likely that the Denghoog served as a burial site for a family or clan over a period spanning several generations.
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.