The evergreen fir tree has been used to celebrate winter festivals for thousands of years. Pagans used branches of it to decorate their homes during the winter solstice, as it made them think of the spring is about to come. The Romans used Fir Trees to decorate their temples at the festival of Saturnalia. Christians use it as a sign of everlasting life with God. Nobody is really sure when Fir trees were first used as Christmas trees. It probably started about began 1000 years ago in Northern Europe.