<https://www.17thshard.com/forums/topic/60173-did-the-number-16-have-any-significance-before-the-shattering-of-adonalsium/#comment-584332>
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"I love this question. My guess is it pre-dates Adonalsium because it seems that planets have their own special number naturally, independent of the Shard that invests there (nb it seems to me - we don't know for sure).\n "
<https://www.17thshard.com/forums/topic/60173-did-the-number-16-have-any-significance-before-the-shattering-of-adonalsium/>