Borobudur is the largest Buddhist monument in southeast Asia. A Mahayana Buddhist site with the shape of a mandala, it is located near the city of Magelang in central Java. Borobudur consists of six square and three circular platforms, decorated by bas-reliefs totalling over a km in length (2672 panels) and 504 Buddha statues. The central stupa at the top of the monument is surrounded by 72 perforated stupas housing Buddha statues. The construction of Borobudur was completed in the 9th century, probably in 825 AD. Borobudur was abandoned at some point between the 11th and 15th centuries and rediscovered by Dutch archaeologists in the 19th century. The Borobudur temple compounds have been a UNESCO world heritage site since 1991.