There are few trees that have their own hashtag on Twitter, but the tree in London’s Trafalgar Square has more than a hashtag — #trafalgartree — it has its own poem, written annually in tribute. The tree is donated to the British people every year by the people of Norway to commemorate British support during World War II. It’s a tradition that was started in 1947 and later inspired a poetry project to follow its felling in a forest outside Oslo. The tree has provided a central focus for the Trafalgar Square traditional carol-singing program, performed by different groups raising money for voluntary or charitable organizations. The tree remains until just before the Twelfth Night of Christmas, when it's taken down for recycling. The tree is chipped and composted to make mulch.