Economy of Indonesia the Republic of Indonesia), a currency issued by the Republican Government which was the predecessor of Rupiah. Despite so, currency issued during the Japanese occupation and by Dutch authorities were still in circulation, and simplicity of the ORI made its counterfeiting straightforward, worsening matters. Once the nation's independence has been recognised by the Netherlands on December 1949, the next 10 years saw the devaluation of Dutch banknotes into half their value ("Gunting Sjafruddin"), dissolution of the United States of Indonesia in 1950, and during the liberal democracy period the nationalization of "De Javasche Bank" into modern Bank Indonesia and the
National symbols of Indonesia and hoisted in public at the Indonesian Independence Day ceremony, on 17 August 1945. The design of the flag has remained the same ever since. Indonesia Raya is the national anthem of the Republic of Indonesia. The song was introduced by its composer, Wage Rudolf Supratman, on 28 October 1928 during the Second Indonesian Youth Congress in Batavia. The song marked the birth of the all-archipelago nationalist movement in Indonesia that supported the idea of one single "Indonesia" as successor to the Dutch East Indies, rather than split into several colonies. Indonesian language () is the official language of Indonesia.