Hamengkubuwono VIII (3 March 1880 – 22 October 1939), also spelled as Hamengkubuwana VIII, was the 8th sultan of Yogyakarta, reigning from 1921 until he died in 1939. During his reign, he carried out the rehabilitation of the Kraton Ngayogyakarta Hadiningrat building, as well as several other structures. He was also one of the first to support Kyai Haji Ahmad Dahlan in the formation of the Muhammadiyah organization.[1]