Londonderry House was an aristocratic townhouse situated on Park Lane in the Mayfair district of London, England. The mansion served as the London residence of the Marquesses of Londonderry. It remained their home until 1962. In that year Londonderry House was sold by the Trustees of the 7th Marquess of Londonderry's Will Trusts to a developer who built the "Londonderry Hotel" on the site, not the Hilton. The Hilton Hotel is on the other side of the street, and had already been opened. COMO Metropolitan London now occupies the site of Londonderry House.
Londonderry House, c. 1900
The library, 1920s
The main stairway (upstairs), 1920s
The drawing room, 1920s
Townhouse (Great Britain)
In British usage, the term townhouse originally referred to the opulent town or city residence of a member of the nobility or gentry, as opposed to their country seat, generally known as a country house or, colloquially, for the larger ones, stately home. The grandest of the London townhouses were stand-alone buildings, but many were terraced buildings.
Spencer House in St James's, London, one of the last surviving true townhouses still owned by the noble family that built it, the Spencers, although it is now generally leased out commercially. The corresponding country house is Althorp in Northamptonshire.
The Strand front of Northumberland House in 1752 by Canaletto, the townhouse of the Dukes of Northumberland. Note the "Percy Lion" atop the central facade.
Devonshire House, Piccadilly, in 1896
Leicester House on Leicester Fields, 1748