Skandha, which in Buddhist phenomenology and soteriology, are the five "aggregates" which categorize all individual experience.
Dhatu means material remains of a holy person and in this temple the relics belong to Buddha.
Dhātu -- a Buddhist Sanskrit technical term meaning realm or substrate.
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Six triads of object-sense-consciousness, 18 dhātus or realms, function through five skandhas (Pāli khandhas), 'aggregates, aspects'.