A Christmas decoration is any of several types of ornamentation used at Christmastide and the greater holiday season. The traditional colors of Christmas are pine green (evergreen), snow white, and heart red. Gold and silver are also very common, as are other metallic colours. Typical images on Christmas decorations include Baby Jesus, Father Christmas, Santa Claus, and the star of Bethlehem. In many countries, such as Sweden, people start to set up their Advent and Christmas decorations on the first day of Advent. Liturgically, this is done in some parishes through a Hanging of the Greens ceremony. In the Western Christian world, the two traditional days when Christmas decorations are removed are Twelfth Night and if they are not taken down on that day, Candlemas, the latter of which ends the Christmas-Epiphany season in some denominations. Taking down Christmas decorations before Twelfth Night, as well as leaving the decorations up beyond Candlemas, is historically considered to be inauspicious. Christmas decorations are mentioned in ancient descriptions of the Roman feast Saturnalia, which was believed to have originated in the 5th century BC. The tradition of a decorated tree is old since the Celts already decorated a tree, the symbol of life at the time of the winter solstice. The Scandinavians did the same for the Yule festival, which was held around the same date as Christmas. Tertullian complained to the 2nd century that Christians in North Africa decorated their homes with greenery, a pagan symbol. Christmas tree The Christmas tree was first used by German Lutherans in the 16th century, with records indicating that a Christmas tree was placed in the Cathedral of Strassburg in 1539, under the leadership of the Protestant Reformer, Martin Bucer. In the United States, these "German Lutherans brought the decorated Christmas tree with them; the Moravians put lighted candles on those trees." When decorating the Christmas tree, many individuals place a star at the top of the tree symbolizing the Star of Bethlehem, a fact recorded by The School Journal in 1897.