The Shailendra dynasty ( derived from Sanskrit combined words Saila and Indra, meaning "King of the Mountain", also spelled Sailendra, Syailendra or Selendra) was the name of a notable Indonesian dynasty that emerged in 8th century Java whose reign marked a cultural renaissance in the region. The Shailendras were active promoters of Mahayana Buddhism and covered the Kedu Plain of Central Java with Buddhist monuments, one of which is the colossal stupa of Borobudur, now a UNESCO World Heritage Site.