Built in the 9th century during the reign of the Sailendra Dynasty ,a Mahayana stupa assumes that generate about 20th century 7-9 or Buddhist 1393 is located in the central region of the island, near the River Progo , away from Yogyakarta. 40 kilometers of Borobudur built with stone, volcano, about 2 million square feet on each side, large rectangular base 121 meters high is a 403-foot pyramid-shaped and is a place of worship of Buddhism, the largest in the world.