The tradition of decorating a Christmas tree with ornaments, lights, and other decorations dates back to the medieval era when trees were decorated with apples, nuts, and other fruits. During the 16th century in Germany, people began to decorate trees with candles, and this tradition eventually spread to other parts of Europe. In the 19th century, Prince Albert, husband of Queen Victoria, popularized the Christmas tree in Britain by introducing the tradition to the royal family. The tradition of decorating trees with ornaments and lights has become a popular part of Christmas celebrations around the world.