Southwick House

The three-storey house is distinct for its two-storey foyer lit from a cupola and a series of elliptical rooms.

A semi-circular portico is centered on the house's colonnade of paired Ionic columns.

[2] In 1943, with the planning for D-Day already underway, the house was chosen to be the location of the advance or forward command post (Sharpener Camp) of the Supreme Headquarters Allied Expeditionary Force.

[2] In 1944, in the months leading up to D-Day, the house became the headquarters of the main allied commanders, including Allied Supreme Commander General Eisenhower, Naval Commander-in-Chief Admiral Ramsay and Army Commander-in-Chief General Montgomery.

[7] The following year the detached clock tower – a three-stage Italianate structure with a slate roof – was also Grade II listed.

D-Day map in map room, 2019, with markers for positions of forces at the 6 June 1944 landings
Drawing showing map room in operation, 1944
Area of the map showing D-day departure routes from the south coast of England; Isle of Wight in centre
Area of the map showing arrival routes at the Normandy beaches around Arromanches
Former US president Eisenhower (right) revisited the map room in 1963 and was interviewed by Walter Cronkite