Supreme Council of State of Siam
The Supreme Council of State of Siam (Thai: อภิรัฐมนตรีสภา) was an advisory and legislative council established by King Prajadhipok of Siam (Rama VII) that existed from 1925 to 1932. The Eton- and Sandhurst-educated monarch wished to create a council similar to a cabinet, where the most important government officials could meet to decide on state affairs.
Source: Wikipedia — Supreme Council of State of Siam (CC BY-SA 4.0)