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Now, these weren't a school of painting,
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or an artistic style,
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they were the iconography.
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They were themes that painters depicted.
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And it may also be that portraying the disease in this way
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was a kind of exorcism of the mysterious scourge,
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and this was a powerful reminder
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of the transience of all things.
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There were also popular superstitions in these days.
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From astrology,
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there was the belief that certain metals or precious stones--
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rubies and diamonds--