Question: The Queen Alexandra Memorial on Marlborough Road, London, which commemorates Queen Alexandra of Denmark, consists of a bronze screen incorporating allegorical figures, set into the garden wall of Marlborough House,  a Grade I listed mansion in St James's, City of Westminster, Inner London, is the headquarters of which organization?
Context: The Queen Alexandra Hospital for Women was an Australian hospital established at Hobart, Tasmania in 1905 to commemorate the coronation of King Edward VII and Queen Alexandra in 1902 on a site in Hampden Road, Battery Point. The Queen Alexandra Bridge is a road traffic, pedestrian and (former) rail bridge spanning the River Wear in North East England, linking the Deptford and Southwick areas of Sunderland.  The steel truss bridge was designed by Charles A. Harrison (a nephew of Robert Stephenson's assistant).  It was built by Sir William Arrol between 1907 and 1909 and officially opened by The Earl of Durham, on behalf of Queen Alexandra on June 10, 1909. Marlborough House, a Grade I listed mansion in St James's (City of Westminster, Inner London), is the headquarters of the Commonwealth of Nations and the seat of the Commonwealth Secretariat.  It was built for Sarah Churchill, Duchess of Marlborough, the favourite and confidante of Queen Anne.  For over a century it served as the London residence of the Dukes of Marlborough. Queen Alexandra's Memorial Ode is an ode "So many true Princesses who have gone" written by John Masefield and set to music for choir and orchestra by Sir Edward Elgar for the occasion of the unveiling of Sir Alfred Gilbert's memorial to Queen Alexandra on 8 June 1932 outside Marlborough House in London. The Inner London Sessions House Crown Court, more commonly known as the Inner London Crown Court and distinct from the Inner London Magistrates Court, is a Crown Court building in London, United Kingdom.  It is located in the Sessions House on Newington Causeway at the corner of Harper Road in the Newington area of the London Borough of Southwark in south London.  There has been a judicial building on the site since 1794. Alexandra Park is a neighbourhood located in downtown Toronto, Ontario, Canada.  Alexandra Park is bounded by Dundas Street West on the north, Spadina Avenue on the east, Queen Street West on the south, and Bathurst Street on the west.  Alexandra Park consists of private and public housing, with at grade retail along Queen Street West and Spadina Avenue, some institutional, and several commercial buildings scattered through the neighborhood.  The neighborhood takes its name from Alexandra Park, a municipal park at the south-east corner of Dundas Street West and Bathurst Street.  The park is named for Queen Alexandra, wife of King Edward VII, the first future monarch to visit Toronto. The Insect Farming and Trading Agency (IFTA) was set up by the government of Papua New Guinea in 1978 to regulate the exploitation and conservation of Queen Alexandra's Birdwing and other valuable butterflies.  Papua New Guinea has a spectacular butterfly fauna, including the world's largest butterflies, the Queen Alexandra's Birdwing (Ornithoptera alexandrae) and the Goliath Birdwing (Ornithoptera goliath).  A Cape Alexandra ( ) is a cape which forms the northwest extremity of South Georgia.  It was named "Cape North" in 1775 by a British expedition under James Cook, but this name has since become established for a cape 10 nmi east-northeast which forms the northernmost point of South Georgia.  The name Cape Alexandra dates back to about 1912 and commemorates Queen Alexandra, Consort of King Edward VII of the United Kingdom. The Queen Alexandra Memorial on Marlborough Road, London, which commemorates Queen Alexandra of Denmark, was executed by the sculptor Sir Alfred Gilbert between 1926 and 1932.  It consists of a bronze screen incorporating allegorical figures, set into the garden wall of Marlborough House.  A late example of a work in the Art Nouveau style, it was regarded by the sculptor as his "Swan song". The Garden Wall is a steep alpine area within Glacier National Park well known during the summer months to be heavily covered in dozens of species of flowering plants and shrubs.  Located along the west side of the Continental divide and extending northward from Logan Pass, the Garden Wall can be traversed via the popular Highline Trail and for a distance of over 5 mi to the Granite Park Chalet.  The Going-to-the-Sun Road also passes through portions of the Garden Wall northwest of Logan Pass.  The Weeping Wall is a short stretch of the Going-to-the-Sun Road where water cascades over the Garden Wall to the roadway below.  The Garden Wall is an arête or rock spine that separates the Many Glacier region of the park from Lake McDonald valley.
Answer: Commonwealth of Nations