Francis Bacon. Triptych 1976 © Estate of Francis Bacon

Francis Bacon. Skull of a gorilla 1957© The Estate of Francis Bacon. All rights reserved

Francis Bacon.Study from the human body 1949. © The Estate of Francis Bacon. All rights reserved

Francis Bacon. Three studies for figures at the base of a crucifixion 1944. Oil and pastel on cardboard © Estate of Francis Bacon

Francis Bacon. Second Version of Triptych 1944 painted in 1988. Oil on canvas© Estate of Francis Bacon

Francis Bacon. Trois études de Lucian Freud 1969 © Estate of Francis Bacon

Francis Bacon. Study for a portrait. Oil paint and sand on canvas© Estate of Francis Bacon

Francis Bacon. Seated Figure 1961. Oil on canvas© Estate of Francis Bacon

Francis Bacon. Portrait of Henrietta Moraes on a blue couch 1965. Oil on canvas © Estate of Francis Bacon

Francis Bacon. Portrait of George Dyer riding a bicycle 1966. Oil on canvas © Estate of Francis Bacon

Francis Bacon. Man with Dog 1953. Oil on canvas © Estate of Francis Bacon

Francis Bacon. Figures in a garden 1936. Oil on canvas© Estate of Francis Bacon

Francis Bacon. Figure in a landscape 1952. Oil on paper © Estate of Francis Bacon

Francis Bacon. Figure in a landscape 1945. Oil on canvas© Estate of Francis Bacon

Francis Bacon. Crouching nude 1961© Estate of Francis Bacon

Francis Bacon. Triptych 1976 © Estate of Francis Bacon