The House of Knights (Riddarhuset) is the corporation of the Swedish nobility. Between the 17th and the 19th century the House of Knights was a chamber in the Riksdag of the Estates, and as such, a Swedish equivalent to the British House of Lords.
After 1866, when the Riksdag of the Estates was replaced by the new Riksdag, the House of Knights served as a quasi-official representation of the Swedish nobility, regulated by the Swedish government. Since 2003 it is a private institution, which maintains records and acts as an interest group for the Swedish nobility.
The House of Knights is also the name of the building maintained by the corporation in Stockholm old town. The south end of the building carries the Latin inscription CLARIS MAIORUM EXEMPLIS, after the clear example of the forefathers, and holds a statue of Gustav Vasa. North of the building is a park in which is a statue of Axel Oxenstierna.