Have you ever wondered where the tradition of sending Christmas cards every year came from? While the first Christmas cards appeared in Britain back in the 1840s, it was a German immigrant named Louis Prang who made them popular in the United States and around the world. Using a revolutionary new color printing technique that he called chromolithography, Prang’s Roxbury factory made the most popular greeting cards in the country from the 1870s until the turn of the century.

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