American Embassy
24 Grosvenor Square
The American embassy moved to Grosvenor Square (from Great Cumberland Place, Piccadilly, Portland Place and the Grosvenor Gardens) in 1938. During this time, because of the storm clouds over Europe, Grosvenor Square began to accommodate a number of U.S. government offices including General Eisenhower's HQ and the European headquarters of the US Navy.
The building, pictured, was constructed in the late 50s, opening in 1960, designed by Finnish American modernist Eero Saarinen. The building is nine storeys, three of which are below ground. A large gilded aluminum blad eagle by Theodore Roszak, with a wingspan of over 35 feet is on the roof.
In October 2009, the building was granted Grade II listed status, which is gonna make it difficult when the developers try to convert the land to a 5* hotel.
In 2008, the Americans announced they will move the Embassy to 9 Elms in Wandsworth (South of the river !) in a secure compound.
When Sonnet and I first arrived in London, we walked right up the steps into the building. Now there are several layers of security and access for a pre arranged appointment takes 30 minutes (at least).