Estonia, one of the first countries to introduce Christmas trees, celebrates the holiday

People walk around a Christmas tree decorated for the Christmas and New Year festivities at the Noblessner port in the Tallinn Bay, Estonia, Saturday, Dec. 16, 2023. In Estonia, as in many parts of the world, trees covered with lights brighten up homes and town squares during the Winter Solstice and Christmas festivities afterwards. (AP Photo/Pavel Golovkin)

TALLINN, Estonia — Christmas trees started appearing in Central Europe and the Baltic States, including Estonia, as early as the Middle Ages and have now become traditional across much of the world.