The Ridderzaal is the main building of the 13th-century inner square of the former castle of the counts of Holland called Binnenhof at the address Binnenhof 11 in The Hague, Netherlands. It is used for the state opening of Parliament on Prinsjesdag, when the Dutch monarch drives to Parliament in the Golden Coach and delivers the speech from the throne. It is also used for official royal receptions, and interparliamentary conferences.

More details: https://en.wikipedia.org/wiki/Ridderzaal