The Republic of Indonesia counts around 17,000 islands and a rich cultural heritage that bears clear traces from a long history of trade and exchange across the archipelago and with the wider Indian Ocean region. Until 2012, the country's cultural world heritage sites – Borobudur Temple Compounds (1991), Prambanan Temple Compounds (1991), and Sangiran Early Man Site (1996) – were all located in Central Java. Another 19 sites, more spread across the main islands, are on UNESCO's Tentative List.