Svarloka (in Buddhism: Arupadhatu), The highest and holiest realm, reserved for the gods. Also known as svargaloka. The inner courtyard and also the roof of each temple symbolize the realm of svarloka. The roof of Prambanan temples are adorned and crowned with ratna (sanskrit: jewel), The form of Prambanan Ratna https://prsphereonline.blogspot.com/