ku phra kona, group of khmer prangs or pagodas in roi et province, northeastern thailand

11th ancient architectural architecture asia baphuon brick buddha buddhism buddhist building built cambodia castle century chedi group historical history isan khmer kona laterite monastery northeast northeastern pagoda pagodas park phra prang prangs province religion roiet royet ruin sanctuary sandstone stone stucco stupa style suwannaphum temple thai thailand tower with