How about the assassin's creed logo? Probably nice in black, but red isn't bad either.
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In terms of copyright, the article here seems to have two conflicting opinions as to whether or not this is copyrighted. https://commons.wikimedia.org/wiki/File:Assassin%E2%80%99s_Creed_logo.svg
"This image of simple geometry is ineligible for copyright and therefore in the public domain, because it consists entirely of information that is common property and contains no original authorship."
"This work contains material which may be subject to trademark laws in one or more jurisdictions. Before using this content, please ensure that you have the right to use it under the laws which apply in the circumstances of your intended use. You are solely responsible for ensuring that you do not infringe the rights to this trademark."
I'm not sure exactly what the logo is suppose to represent. It almost looks like it's a pair of calipers or some instrument used for cartography, in which case I'd be inclined to think that it's not copyrighted.
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Seems like it's similar to the logo for the Freemason's guild, which would only support that theory.
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