Sisavang Vatthana or sometimes
Savang Vatthana (full name Samdach Brhat Chao Mavattaha Sri Vitha Lan Xang Hom Khao Phra Rajanachakra Lao Parama Sidha Khattiya Suriya Varman Brhat Maha Sri Savangsa Vadhana) (13 November 1907 – 13 May (
?) 1978; or perhaps as late as 1984) was the last
king of the
Kingdom of Laos. He ruled from 1959 after his father's death until his forced abdication in 1975. Savang Vatthana proved unable to manage a country in political turmoil. His rule ended with the takeover by the
Pathet Lao in 1975, after which he and his family were sent to a re-education camp by the new government.