The Kehlsteinhaus (known as the Eagle's Nest in English-speaking countries) is a Third Reich-era edifice erected atop the summit of the Kehlstein, a rocky outcrop that rises near the town of Berchtesgaden. It was presented to Adolf Hitler on his 50th birthday as a retreat and place to entertain friends and visiting dignitaries. Today it is open seasonally as a restaurant, beer garden, and tourist site.
The Kehlsteinhaus was commissioned by Martin Bormann in the summer of 1937 as a 50th birthday gift for Adolf Hitler. Paid for by the Nazi Party, it was completed in 13 months but held until a formal presentation in 1939. From a large car park a 124m entry tunnel leads to an ornate elevator which ascends the final 124m to the building. Its car is surfaced with polished brass, Venetian mirrors and green leather. Construction of the entire project cost the lives of 12 workers. The building's main reception room is dominated by a fireplace of red Italian marble presented by Italian dictator Benito Mussolini, which was damaged by Allied soldiers chipping off pieces to take home as souvenirs. Much of the furniture was designed by Paul László.
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.