Christmas trees are believed to have originated in Germany in the 16th century. It was believed that the evergreen tree symbolized eternal life, and the practice of bringing a tree inside the house during the winter months to celebrate the season was born. The custom gradually spread across Europe and eventually to the United States, where it became a popular tradition during the holiday season. Today, Christmas trees are one of the most iconic symbols of Christmas, bringing joy and festive cheer to homes across the world.