In the December 10 ceremony is 2475 (1932) Constitution of the Kingdom of Siam at the King which. Dusit Palace Ever since. In Thai, it changed the regime from absolute monarchy to democratic regime, with the King as head of State.
Later in the day on December 10, 2475, was the ceremonial Constitution of the Kingdom of Siam at City Hall. Dusit Palace since Thailand is a regime change from monarchy to democracy, with the monarch as head of state.