The Christmas Tree symbol originated with ancient Egyptians, Chinese, Romans, and other cultures. They would use evergreens to mark the celebration of the winter solstice, at the end of the harvest year. The evergreen was a symbol of the spirit of renewal. Druids used holly and mistletoe as symbols of eternal life.
This symbol also appeared in the Middle Ages to mark an Adam and Eve pagan festival.
In the Middle Ages, evergreens were decorated with red apples to mark the pagan festival of Adam and Eve.