| The great hall of House of Nobility Riddarhuset, on the Stadsholmen island of the Old Town district Gamla Stan, Stockholm, Sweden. A palace built in 1641-1674 in Baroque style. Between the 17th and the 19th century it was a chamber in the Estates of the Realm, and as such, a Swedish equivalent to the British House of Lords.
After 1866, the Swedish House of Lords served as a quasi-official representation of the Swedish nobility, regulated by the Swedish government. Since 2003, this institution maintains records and acts as an interest group on behalf of the Swedish nobility, with the main purpose to maintain old traditions and culture. The great hall was used by the aristocracy for meetings of Parliament during the Diet of the Four Estates 1668-1865. Today, the Nobility gathers here for the Assembly of Nobles, which occurs every third year. At the Assembly, each family that is introduced in the House of Nobility can be represented by one delegate. The great hall is also used as a meeting place for the Swedish noble families as well as for chamber concerts. Hanging on the walls of the hall are the coat of arms of 2331 noble families. The coat of arms are arranged in numerical order according to the year of introduction. Those of the oldest families are placed on the south wall 
 
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