Valentine's Day may have origins in the Roman festival Lupercalia, celebrating fertility.
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Several Christian martyrs named Valentine are associated with the day.
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Geoffrey Chaucer linked the day to romantic love in the 14th century.
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The Duke of Orleans sent the first known Valentine's Day card from the Tower of London.
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By the 18th century, the day evolved into exchanging cards and gifts, leading to commercialization.
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The Victorian era popularized elaborate cards and love notes, shaping modern expressions of love.
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The iconic heart shape became synonymous with love in the 19th century.
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Today, Valentine's Day is celebrated worldwide with diverse customs and expressions of affection.
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