The Christmas tree is a symbol of the holiday season, and its origins can be traced back to 16th century Germany. The German people would decorate their homes with evergreen trees during the winter solstice, a time when the days are shortest and the nights are longest. They believed that the evergreen trees symbolized everlasting life, and that bringing one into their homes would bring them good luck and protect them from evil spirits. Over time, the tradition of decorating evergreen trees spread throughout Europe, and by the 19th century, it had become an important part of Christmas celebrations around the world.