The Great Post Office building on Jalan P. Senopati 2 (during the Dutch period it was called Kampementstraat) to the north, and Ian Trikora (formerly named Pangurakan then during the Dutch period called Kadasterstraat) to the west. The building which was founded in 1912 by engineers from Burgerlijke Openbare Werken or the Dutch Public Works Department was used for the Post, Telegraaf en Telefoonkantoor (PTT) or the Post, Telegraph and Telephone Office. Now the building is called the Yogyakarta Post Office, still in good condition and well maintained under the state-owned company (BUMN) PT Pos Indonesia. Even though it has changed its name, its function is still the same as the Post Office. In the mid-19th century the Dutch East Indies government established PTT in Bandung as its headquarters, which was then expanded to the regions. In 1942 the Dutch East Indies government fell into Japanese hands, including controlling the Post, Telegraph and Telephone Offices. In 1945 Japan lost the war, followed by Indonesian independence on August 17, 1945. On September 1, 1945 the Central PTT Office, Bandung issued an instruction that all PTT offices, both at the center and in the regions, had their leadership and power held by the Indonesian people, the government of the Republic of Indonesia. . The Indonesian youths, with the spirit of struggle, urged Japan to give PTT to the Republic of Indonesia. With great struggle, on September 27, 1945, this institution succeeded in the hands of Indonesia, and Mas Soeharto was appointed head of the PTT Bureau. He lived in a house on Jalan Gemblakan 47. The proclamation of Indonesian independence did not stop the Dutch from taking control of Indonesia again, even by taking up arms. For the safety of the Republic of Indonesia, in 1946 the national capital was moved from Jakarta to Yogyakarta. Until around the first Military Aggression event on 21 July 1947 for communication purposes during the struggle, PTT radio stations were installed in various areas including Yogyakarta. Important actions were also taken, including moving the Radio and Telecommunications Laboratory Center from Bandung to Yogyakarta and Surakarta. During this period of struggle the role of the PTT led by Mas Soeharto was very important. At the house on Jalan Gemblakan 47, Mas Soeharto worked silently, but the Dutch kissed him too. The plan was that on January 19, 1949 the PTT equipment would be moved out of town, but it failed! Because on January 17, at midnight, the house on Jalan Gemblakan 47 was surrounded by IVG (Informatie voor Geheimen) troops of the Secret Service of the Dutch Army. Troops led by Lieutenant Kramers searched the contents of the house and it was proven that Mas Soeharto served as General Postmaster (Head of Post), then was arrested on charges of using PTT zenders for guerrilla purposes. For his service and dedication to the country, on December 27, 1962 the Government of the Republic of Indonesia established the late Mas Soeharto as a Hero of PTT and became Mahaputera Tk III, while his star was pinned on Mrs. Soeharto as the representative of the deceased.
The two-storey Post Office building from the colonial period has a U-shaped plan, has a building area of 1,121.45 m2 on a land area of 6,400 m2. From the front, the facade shows a half-arch opening, while on the other side it has a rectangular opening. On the pyramid roof at the ends, as well as on the tops of the two tajug which protrude forward so as to form a 'tower' flanking the center, there is an ornamental mace. On the roof of the building at the front right in the middle there is a dormer that functions as air circulation.
At the time of the earthquake on May 27 2006 there was damage to the building, then PT Pos Indonesia immediately carried out renovations by means of adaptation, namely maintaining the originality of the building, for example the facade of the building, the presence of marble stairs to the top floor, the meeting room, the brievenbus mailbox can still be witnessed . Adaoun to meet the needs of community service services, to the south of the main building an additional new building was built which is in harmony with the old building. Until now this heritage building from the Dutch era has become one of the markers that stands near the axis of philosophy.***