King Prajadhipok Museum
Phra Bat Somdet Phra Poramintharamaha Prajadhipok Phra Pok Klao Chao Yu Hua (Thai:พระบาทสมเด็จพระปรมินทรมหาประชาธิปกฯ พระปกเกล้าเจ้าอยู่หัว) or Rama VII (8 November 1893 - 30 May 1941) was the seventh monarch of Siam under the House of Chakri. He was the last absolute monarch and first constitutional monarch of the country. His reign was a turbulent time fore Siam due to huge political and social changes during the Revolution of 1932. Also he was the only Siamese monarch to abdicate.
Interesting article about King Prajadhipok on Wikipedia.