Svarloka (in Buddhism: Arupadhatu), the very best and holiest realm, reserved for the gods. Often called svargaloka. The internal courtyard along with the roof of every temple symbolize the realm of svarloka. The roof of Prambanan temples are adorned and crowned with ratna (sanskrit: jewel), the shape of Prambanan Ratna https://www.diigo.com/user/hindumandir