Recently, researchers have uncovered a series of letters written by the infamous Vlad the Impaler that could shed some light on his mysterious life. The letters, written by Vlad to the ruler of Wallachia in the 15th century, revealed a possible condition the ruler may have suffered from known as porphyria, a genetic disorder that can cause mental instability and physical pain. The letters, written in Latin, describe Vlad’s feelings of severe pain and anxiety, symptoms of porphyria. This finding could provide a better understanding of Vlad’s seemingly cruel and violent behavior.

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source: Phys.org