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 and thought; and their delight in the Christmas-trees is not less than ours used to be". A boost to the trend was given in 1848 when "The Illustrated London News", in a report picked up by other papers, described the trees in Windsor Castle in detail and showed the main tree, surrounded by the royal family, on its cover. In fewer than ten years their use in better-off homes was widespread. By 1856 a northern provincial newspaper contained an advert alluding casually to them, as well as reporting the accidental death of a woman whose dress caught fire as she