Picea abies outside of its native range, and one of the most economically important coniferous species in Europe. It is used as an ornamental tree in parks and gardens. It is also widely planted for use as a Christmas tree. Every Christmas, the Norwegian capital city, Oslo, provides the cities of London (the Trafalgar Square Christmas tree), Edinburgh and Washington D.C. with a Norway spruce, which is placed at the most central square of each city. This is mainly a sign of gratitude for the aid these countries gave during the Second World War. In North America, Norway spruce is widely planted,
Christmas tree most Christian churches continue to display the traditional Christmas tree in their sanctuaries during Christmastide. In 2005, the city of Boston renamed the spruce tree used to decorate the Boston Common a "Holiday Tree" rather than a "Christmas Tree". The name change was reversed after the city was threatened with several lawsuits. Christmas tree A Christmas tree is a decorated tree, usually an evergreen conifer such as spruce, pine, or fir or an artificial tree of similar appearance, associated with the celebration of Christmas, originating in Northern Europe. The custom was developed in medieval Livonia (present-day Estonia and Latvia), and