The Borobodur Temple complex is one of the greatest monuments in the world. It is of uncertain age, but thought to have been built between the end of the seventh and beginning of the eighth century A.D. For about a century and a half it was the spiritual centre of Buddhism in Java, then it was lost until its rediscovery in the eighteenth century.
The structure, composed of 55,000 square meters of lava-rock is erected on a hill in the form of a stepped-pyramid of six rectangular storeys, three circular terraces and a central stupa forming the summit. The whole structure is in the form of a lotus, the sacred flower of Buddha.
courtesy: buddhanet website