The Yogyakarta Sultanate, formally the Sultanate of Ngayogyakarta Hadiningrat, was formed in 1755 when the existing Sultanate of Mataram was divided by the Dutch East India Company (VOC) in two under the Treaty of Giyanti. This treaty states that the Sultanate of Mataram was to be divided into the Sultanate of Ngayogyakarta Hadiningrat with Yogyakarta as the capital and Mangkubumi who became Sultan Hamengkubuwono I as its Sultan and the Sultanate of Surakarta Hadiningrat with Surakarta as the capital and Pakubuwono III who was the ruler of the Sultanate of Mataram as its Sultan. The Sultan Hamengkubuwono I spent the next 37 years building the new capital, with the Kraton as the centerpiece and the court at Surakarta as the blueprint model. By the time he died in 1792, his territory exceeded Surakarta's.The ruler Sri Sultan Hamengkubuwono IX (April 12, 1912 - 1988) held a degree from the Dutch Leiden University, and held for a time the largely ceremonial position of Vice-President of Indonesia, in recognition of his status, as well as Minister of Finance and Minister of Defense.
In support of Indonesia declaring independence from the Dutch and Japanese occupation, in September 5, 1945, Sri Sultan Hamengkubuwono IX of Yogya and Sri Paku Alam VIII in Yogya declared their sultanates to be part of the Republic of Indonesia. In return for this unfailing support, a law was passed in 1950, in which Yogyakarta was granted the status of province Daerah Istimewa (Special Region Province), with special status that recognizes the power of the Sultan in his own region's domestic affairs. Hence Sultan Hamengkubuwono IX was appointed as the governor for life. During the Indonesian National Revolution against the Dutch after World War II (1945-1950), the capital of the newly-declared Indonesian republic was temporarily moved to Yogyakarta when the Dutch reoccupied Jakarta from January 1946 until August 1950...
Yogyakarta Sultanate Residences :
The principal residence of the sultan is the kraton (palace), sometimes called the Yogyakarta Kraton but more properly known as Kraton Ngayogyakarta Hadiningrat.