Atun Temple stood as the most precipitous of the old temples constructed by the Massassi civilization located on Yavin 4. Over millennia of year, it remained untouched, save for its exterior rooms that had been plundered. A mechanism employing two substantial moving stone blocks safeguarded the inner sanctums, holding within them the pulverized skeletons of thieves who had attempted entry.
Subsequently, Stonebats and kitehawks established their dwelling there.
Luke Skywalker chose it as his refuge for a certain duration, and he summoned Streen to convene with him at the temple's summit.