Kites were invented in Asia, though their exact origin can only be speculated. The oldest depiction of a kite is from a mesolithic period cave painting in Muna island, southeast Sulawesi, Indonesia, which has been dated from 9500–9000 years B.C. It depicts a type of kite called "", which are still used by modern Muna people. The kite is made from "kolope" (forest tuber) leaf for the mainsail, bamboo skin as the frame, and twisted forest pineapple fiber as rope, though modern kites use string.