London's most famous square was laid out in 1829 to 1841 to commemorate Nelson's victory at the Battle of Trafalgar in 1805.
Trafalgar Square is probably most famous for the pigeons that flock here in huge numbers; although Red Ken has banned the sale of pigeon food.
Nelson's Column stands over 185 feet (56 metres) high. Around the base of the column are the four giant bronze lions by Landseer.
Around the sides of the square are the church of St Martin's in the Fields and the National Gallery which houses one of the world's richest collections of paintings
What's going on in and around Trafalgar Square?
Trafalgar Square was
transformed into a "World Square"
by Ken Livingstone when he was mayor.