It's the ultimate piece of war memorabilia: an apartment in the building that served as a base for the Special Operations during the planning of D-Day has just gone up for sale.
The only catch? You'll need a cool £4.75m to live in it.
The five-bedroom duplex apartment is in Montagu Mansions, used as a headquarters for the American Office of Strategic Services/Special Operations throughout the Second World War.
The group - referred to as "Churchill's Private Army" - played a leading role in Operations Neptune and Overlord, the two military operations which led to the Normandy Landings.
The mansion block also features a commemorative plaque from the City of Westminster,.
The apartment includes an entrance hall with a marble inlaid flood, a formal drawing room - and a second sitting room.
“Not only is this a grand Victorian Mansion flat, with three-metre high ceilings and a classical fit and finish that you simply do not find in new-build apartments; but it is steeped in British and American military history," enthused Paul Sulkin, director at Kay & Co, the estate agent marketing the apartment.
"The original features, including the magnificent marble flooring and private raised entrance direct from the road give a real sense of occasion every time you step through the front door.” Oooh-err.