Apsley House stands alone at Hyde Park Corner, on the south-east corner of Hyde Park, facing south towards the busy traffic roundabout in the centre of which stands the Wellington Arch.

The house is now run by English Heritage and is open to the public as a museum and art gallery, although the 8th Duke of Wellington still uses the building as a part-time residence. It is sometimes referred to as the Wellington Museum. It is perhaps the only preserved example of an English aristocratic town house from its period.

The practice has been to maintain the rooms as far as possible in the original style and decor. It contains the 1st Duke’s collection of paintings, porcelain, the silver centrepiece made for the Duke in Portugal, c. 1815, sculpture and furniture. Antonio Canova’s heroic marble nude of Napoleon as Mars the Peacemaker made 1802-10, holding a gilded Nike in the palm of his right hand, and standing 3.45 metres to the raised left hand holding a staff. It was set up for a time in the Louvre and was bought by the Government for Wellington in 1816 (Pevsner) and stands in Adam’s Stairwell.

The house was given the popular nickname of Number One, London, since it was the first house passed by visitors who travelled from the countryside after the toll gates at Knightsbridge. It was originally part of a contiguous line of great houses on Piccadilly, demolished to widen Park Lane.

In 1807 the house was purchased by Richard Wellesley, 1st Marquess Wellesley, the elder brother of Sir Arthur Wellesley, but in 1817 financial difficulties forced him to sell it to his famous brother, by then the Duke of Wellington, who needed a London base from which to pursue his new career in politics.

Gerald Wellesley, 7th Duke of Wellington, gave the house and its most important contents to the nation in 1947, but by the Wellington Museum Act 1947 the right of the family to occupy just over half the house was preserved so long as there is a Duke of Wellington. The family apartments are now on the north side of the house, concentrated on the second floor.