Palais Augarten was constructed in the late 17th century by Johann Bernhard Fischer von Erlach on the site of a hunting château and gardens. In 1780 this palace came into the possession of Joseph II, Holy Roman Emperor. Until the beginning of the twentieth century it remained in the possession of the Habsburg family. During this period, and especially in the nineteenth century, many balls were held in the palace, and a salon was opened. Among the guests at that time were Richard Wagner, Franz Liszt, and Hans Makart.
The greatest ball in the Palais Augarten took place on the occasion of the Viennese World's Fair of 1873; among the guests were Emperor Francis Joseph I and Czar Alexander II of Russia. In 1897 the palace was significantly remodelled for the family of Archduke Otto, the nephew of Emperor Francis Joseph.
Despite extensive damage suffered during World War II, the palace has been maintained almost in its original appearance, and many of the original furnishings can still be found there. Today, Palais Augarten is the home and rehearsal space of the Vienna Boys' Choir, who also have their own school there. The palace is located on 130-acre Augarten park, which is the oldest Baroque garden in Vienna.
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.