The Christmas tree is a modern invention. It is a largely secular symbol, having no basis in the Bible. There are many trees in the Bible, from the Tree of Knowledge and the Tree of Life in Genesis to the reference to Christ’s cross as a “tree” in Acts. But there is no Christmas tree.
The same is true of ancient, pagan sources. While it might be tempting to draw connections between the Christmas tree and pagan gods and festivals, such as the Egyptian god Ra and the Roman festival Saturnalia, the Christmas tree as we know it is completely unrelated.
