Evergreen trees were decorated in the 15th century. The first Christmas tree although not actually called that was decorated in Strasbourg, Germany. In Germany around the middle 1850's trees were brought inside and decorated for the Christmas celebration.
A beautifully decorated evergreen tree, with colored lights ablaze inspires in many warm memories of Christmases long past. The Christmas tree has become one of the most beloved and well known holiday symbols.
Christmas trees originated in the Germanic states around the 15th century. Evergreen trees, especially the Fir tree, being beautiful and green in the winter were commonly used for decorations. The triangular shape was suggestive of the Christian Trinity and the evergreen trees were used to symbolize the "Tree of Life."
Then later on Martin Luther used the Christmas Tree as a symbol for the Tree of Life instead of the nativity.
