 On 4 November 1754, Pakubuwana III delivered a letter to the Governor-General of the Dutch East India Company, Jacob Mossel, regarding his agreement on the outcome of negotiations between the Governor of North Java, Hartingh, and Prince Mangkubumi.Based on the negotiations carried out on September 22-23, 1754 and the approval letter of Pakubuwana III, the Agreement on February 13, 1755 was signed in Giyanti.After the signing of the treaty, Mangkubumi took the title of Sultan Hamengkubuwono and set up his court in Yogyakarta, not far from Kotagede, now a suburb of the city, where the tomb of Senopati, the founder of Mataram, is located.