The National Museum of Indonesia keeps 160,000 historical objects of value consisting of 7 types of Prehistoric collections, Classical or Hindu - Buddhist Archeology; Numismatic and Heraldic; Ceramics; Ethnography, Geography and History. The National Museum Complex was built on 26,500 square meters of land and has two buildings. Building A is used for showrooms and collection storage. While Building B, also known as the Arca Building, which was officially opened on June 20, 2007 by President Susilo Bambang Yudhoyono, besides being used for exhibitions, it is also used for offices, conference rooms, laboratories and libraries. (Source: Organization Website)