Which London square was nicknamed 'Eisenhower Platz' during WWII?

Grosvenor Square is a large garden square in the Mayfair district of London. It is the centrepiece of the Mayfair property of the Duke of Westminster.

Sir Richard Grosvenor (who the square is named after) obtained a licence to develop Grosvenor Square and the surrounding streets in 1710, and development is believed to have commenced in around 1721. Grosvenor Square was one of the three or four most fashionable residential addresses in London from its construction until the Second World War, with numerous leading members of the aristocracy in residence.

Grosvenor Square has been the traditional home of the official American presence in London since John Adams established the first American mission to the Court of St. James's in 1785. Adams lived, from 1785 to 1788, in the house which still stands on the corner of Brook and Duke Streets.

During the Second World War, Dwight D. Eisenhower established a military headquarters at 20 Grosvenor Square, and during this time the square was nicknamed "Eisenhower Platz". Until 2009, the United States Navy continued to use this building as its headquarters for United States Naval Forces Europe. A statue of Franklin D. Roosevelt, sculpted by Sir William Reid Dick, stands in the square, as does a later statue of Eisenhower and later one of Ronald Reagan. The square also contains the Eagle Squadrons Memorial.