Throughout his reign, Sisavang Vong consistently supported the French administration in Laos. In 1945, he refused to collaborate with Lao nationalists, which led to his removal from power when the
Lao Issara declared the nation's independence. In April 1946, the French regained control and restored him as king, marking the first time in nearly 250 years that a Lao monarch ruled the entire region now known as Laos. Sisavang Vong's reign lasted 55 years, during which he ruled over Luang Prabang and Laos. When he fell ill, he appointed his son, Crown Prince
Savang Vatthana, as regent. His son succeeded him after his death in 1959. Sisavang Vong was cremated and buried at Vat That Luang (Luang Prabang) in 1961. His funeral procession included a royal funeral carriage, a 12 metre high wooden hearse decorated with a carved seven-headed snake. Many dignitaries attended the state funeral, including Prince
Bhanubandhu Yugala, who represented Thailand.
Sisavangvong University was founded in his honour, but was closed in 1975 when the communist regime took control of Laos. Notably, statues of Sisavang Vong remain in Luang Prabang and Vientiane, surviving the communist revolution. These statues show him giving the people a constitution, symbolising his role in achieving independence from the
French Union. ==Honours==