Leconfield House, Office building in Mayfair, United Kingdom
Leconfield House is a seven-storey office building on Curzon Street with modern architectural design, located in the affluent London neighbourhood of Mayfair. The building stands out for its contemporary appearance and occupies a prominent position within this historic area.
The building served as the operational headquarters for MI5, the British intelligence service, from 1945 to 1976 during the Cold War. This period established its role as a centre for the country's major security operations.
The entrance features the sculpture 'Aspirations' by John Brown, which reflects the relationship between modern design and public space in this upscale London neighbourhood. The art installation shapes how people experience the street and shows how contemporary works are integrated into Mayfair's urban environment.
The building is located on Curzon Street and is well-served by public transport with several underground stations nearby. Visitors should note that the property is currently in private use, and access to the interior may not be publicly available.
The site was built on the foundations of Chesterfield House, a Palladian mansion constructed in 1746 for Philip Stanhope, the 4th Earl of Chesterfield. This layering of history shows how the use of a location transforms over centuries, from a classical residence to modern office space.
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