In 1843, a British artist named John Callcott Horsley was the first person to sell Christmas cards. He created a card that featured a family celebrating Christmas and wishing the recipient a "Merry Christmas and a Happy New Year." The cards were sold through his studio and quickly became popular, and other artists began creating their own designs. The tradition of sending Christmas cards has since become an integral part of the holiday season, with millions of cards being sent each year.