Page "Swedish Constitution of 1772" Paragraph 4

Formally, the 1772 Constitution was adopted by the Parliament ( Riksdag ) on 21 August 1772, but this took place as members of the Parliament and the Privy Council were under threat by the royal garrison on order by King Gustav III outside of Stockholm Palace, where the Parliament and Privy Council were assembled in different parts of the palace.

Leading members of the Caps party who sat in the Privy Council ( as well as in Parliament ) were arrested, as they were locked up in the Privy Council Room and released shortly after the adoption of the constitution.