The Styrian Armoury (Landeszeughaus) is the world's largest historic armoury and attracts visitors from all over the world. It holds approximately 32,000 pieces of weaponry, tools, suits of armour for battle and ones for parades.
Between the 15th century and the 18th century, Styria was on the front line of almost continuous conflict with the Ottoman Empire and with rebels in Hungary. In order to defend itself it needed troops and these troops needed equipment. The Styrian Armoury results from the resulting need to store large quantities of armour and weapons, and was built from 1642 - 1645 by a Tyrolean architect called Antonio Solar.
After about 100 years in use, Austrian empress Maria Theresia wanted to close down the armoury, as part of her centralisation of the defence of Austria. Nevertheless Styria petitioned for the ongoing existence of the armoury for both practical and sentimental reasons. Their petition was accepted and the Armoury was left intact, but largely decommissioned.
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.