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It wasn't encrypted at all.
Cicero - everyone knows that in the army (and even now, there's just no time), I really loved the ancient theme. I'm more of a Greek at heart than a Roman, but still.
Rembrandt - a biblical plot, dark tones, vassal loyalty, and disgusting Jews.
Leather cloak - I wear it in real life, just a different style + black leather in my youth was considered the clothing of real guys and high-ranking Aryans.
I was thinking of sending "The Massacre at Chios" or something by Nikolai Ge for the second one, and an article about Sufism for the first, and something historical for the clothing, but I decided that it would be too obvious.