What is the purpose behind the shape of the Thracian helmet?

[mcantu]

phrygian cap would of held (and still does) some kind of significant/esoteric meaning as it is still used today in symbolism that is often related to the occult.

anyway make what you want of it.

there is a lot of art from Revolutionary America that incorporates the phrygian cap as well. its also in American coinage from the period