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,
Fourth plinth, Trafalgar Square recommended that the plinth should continue to be used for an ongoing series of temporary works of art commissioned from leading national and international artists". After several years in which the plinth stood empty, the new Greater London Authority assumed responsibility for Trafalgar Square and the fourth plinth. The Fourth Plinth Commission is led by the Mayor of London's Culture Team, under the guidance of the Fourth Plinth Commissioning Group. The group is made up of specialist advisers appointed to guide and monitor the commissions for the plinth. Under the stewardship of the Fourth Plinth Commissioning Group, the following artworks