https://en.bitcoinwiki.org/wiki/Promotional_graphics

https://github.com/roslinpl/bitcoin.it-promotional_graphics

https://bitcointalk.org/index.php?topic=1771347.0

https://github.com/roslinpl/bitcoin.it-promotional_graphics/blob/master/bitcoinLogo1000.png

https://raw.githubusercontent.com/roslinpl/bitcoin.it-promotional_graphics/master/bitcoinLogo1000.png