These are held a few times every year so that the government can, as required by the constitution, keep the king informed on matters of state.
[1] The pre-1975 Council of State, which under the 1809 Instrument of Government, exercised executive authority, usually met once a week.
After the introduction of the 1974 Instrument of Government in 1975, however, the monarch's role became strictly ceremonial and royal assent was no longer required for bills to become law.
Some of the original furniture remains, for example the wooden double doors.
The room obtained its current appearance during the reign of Charles XV.