A CHRISTIAN holiday honoring the birth of Jesus Christ, Christmas evolved over the past two millennia into a worldwide religious and secular celebration. The humble Christmas tree has a rich history, from evergreen trees used to symbolize eternal life in Ancient Egypt to tree worship among pagan Europeans. The modern version has its origins in Germany, where the song “O Tannenbaum” is still a festive favorite. Today the traditional tree with lights and decorations appears in cities around the world. Alternative constructions range from recycled rubbish in Mexico City to old window frames in Estonia. Whatever the shape or size, the message is the same: Merry Christmas. SD-Agencies