Grosvenor Gallery went on to exhibit some of the major European artists of the time - some for the first time in London such as Magritte, Picasso, Sironi, Chagall, Lissitzky and Archipenko. The old Grosvenor Gallery that specialized in the Pre-Raphaelites had closed in 1906. It was the largest and best equipped gallery in England at the time.
It was then that Estorick became a full time art dealer and went on to establish the Grosvenor Gallery in 1960, with its first premise on Davies Street. In the initial years, the couple developed a major collection of Italian art, which at one time was considered the most important collection of Italian art outside Italy. Estorick moved to England in 1947 after his marriage to Salome Dessau.
Grosvenor Gallery was first established by the American sociologist and writer Eric Estorick (1913-1993) who began to collect works of art when he came to live in England after the Second World War.