makes tons of sense seeing it again after reading that.
But the grey area resembles to me the negative area of a common Spartan helmet (not Roman) on the first look and by the thread it suggests that will be a recurring confusion... 
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I think you can get away from the helmet association by flattening the points at the bottom (so they become structural, like the base of an arch) and/or add a single repetition, so we see 2 pillars instead of 1
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I reckon it resembles a helmet only because you had a helmet logo in the first place. New users won't get that association as much.
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he/him 