西萨旺·冯
The Kingdom of Laos created in 1947 marked the first time the kingdoms of Laos had been unified since the division of Lan Xang in 1707. The Franco-Lao Treaty of 1953, gave Laos independence and the Royal Lao Government took control of the country. This treaty established a constitutional monarchy, with Sisavang Vong as King and Prince Souvanna Phouma as Prime Minister. In 1959, after the death of his father King Sisavang Vong, Savang Vatthana ascended the throne and was crowned King. On 2 December 1975, King Savang Vatthana was forced to abdicate by the Pathet Lao, after its victory in the Laotian Civil War.