Emperor Khải Định (1885 – 1925) was the 12th Emperor of the Nguyễn Dynasty in Vietnam. His name at birth was Prince Nguyễn Phúc Bửu Đảo. He was the son of Emperor Đồng Khánh, but he did not succeed him immediately. He reigned only nine years: 1916 - 1925.
http://en.wikipedia.org/wiki/Kh%E1%BA%A3i_%C4%90%E1%BB%8Bnh
Such was the life for many an English King or Queen. Ruling for only a few years. This is an amazing mausoleum. Your photos of it all are wonderful. Thank you for sharing.