The centre of Paris contains the most visited monuments in the city, including the Notre Dame Cathedral and the Louvre as well as the Sainte-Chapelle; Les Invalides, where the tomb of Napoleon is located, and the Eiffel Tower are located on the Left Bank south-west of the centre. The banks of the Seine from the Pont de Sully to the Pont d'Iéna have been listed as a UNESCO World Heritage Site since 1991. Other landmarks are laid out east to west along the historic axis of Paris, which runs from the Louvre through the Tuileries Garden, the Luxor Column in the Place de la Concorde, the Arc de Triomphe, to the Grande Arche of La Défense.