In the Western Christian tradition, Christmas trees are variously erected on days such as the first day of Advent or even as late as Christmas Eve depending on the country; customs of the same faith hold that the two traditional days when Christmas decorations, such as the Christmas tree, 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.The relevance of ancient pre-Christian customs to the 16th-century German initiation of the Christmas tree custom is disputed.A later folk version of the story adds the detail that an evergreen tree grew in place of the felled oak, telling them about how its triangular shape reminds humanity of the Trinity and how it points to heaven.Alternatively, it is identified with the "tree of paradise" of medieval mystery plays that were given on 24 December, the commemoration and name day of Adam and Eve in various countries.Resistance to the custom was often because of its supposed Lutheran origins.
Today, there is a wide variety of traditional ornaments, such as garlands, baubles, tinsel, and candy canes.
The modern Christmas tree was developed in medieval Livonia (present-day Estonia and Latvia) and early modern Germany, where Protestant Germans brought decorated trees into their homes.
The tree was traditionally decorated with "roses made of colored paper, apples, wafers, tinsel, [and] sweetmeats".
The Regiment of the local high-Sacristans of the Cistercian Order refers to what may be considered one of the oldest references to the Christmas tree: "Note on how to put the Christmas branch, scilicet: On the Christmas eve, you will look for a large Branch of green laurel, and you shall reap many red oranges, and place them on the branches that come of the laurel, specifically as you have seen, and in every orange you shall put a candle, and hang the Branch by a rope in the pole, which shall be by the candle of the altar-mor." Modern Christmas trees originated during the Renaissance of early modern Germany.
Its 16th-century origins are sometimes associated with Protestant Christian reformer Martin Luther, who is said to have first added lighted candles to an evergreen tree.