The Kewu Plain or Prambanan Plain is a fertile volcanic plain stretching between the southern slopes of Mount Merapi and north-west of the Sewu Mountains . This plain is now included in Sleman Regency in Yogyakarta Province and Klaten Regency in Central Java Province, Indonesia. The Kewu Plain was the seat of the Medang Empire during the 8th century AD to the 10th century AD and the Mataram Sultanate in the 16th century AD. For more than a thousand years this region played an important role in the history of ancient Indonesia and had many important historical relics. If each temple is counted, the Javanese period in the 9th century has produced thousands of Hindu and Buddhist temples spread from the Dieng Plateau, Kedu Plain, to the Kewu Plain in the early history of Indonesia. The area is very rich in monuments where many archeological sites are only a few kilometers away, even some Hindu and Buddhist sites are only a few meters away. The Prambanan Plain is the center of impor