Florin Court is an Art Deco residential building, situated on the eastern side of Charterhouse Square in Smithfield, London, England EC1M 6EY . Built in 1936 by Guy Morgan and Partners, it features an impressive curved facade, a roof garden and a basement swimming pool. It became Whitehaven Mansions, the fictional residence of Hercule Poirot, in the 1990s filming of the TV series based on Agatha Christie's mystery stories.