Aquarian Star
The Aquarian Star, more commonly known as a Unicursal hexagram, is a symbol used to signify membership in the Men of Letters, a group of characters in the TV series Supernatural.
It is a six-pointed sign that represented great power and represented the gates of Atlantis. Henry Winchester, the father of John Winchester, wears one as a tie pin, and it is also seen on the gravestones of those murdered by Abaddon.
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