old stone lintel at ku phra kona, roi et province, northeastern thailand

11th ananta ancient architectural architecture bantom bantomsin baphuon buddhism built carve century chedi door group hindu history khmer kona laterite lintel narai narayana northeast northeastern pagoda pagodas phra prang prangs province recline religion roiet ruin sanctuary sandstone serpent sesha sleep stone stupa style suwannaphum temple thailand tower visanu vishnu with