Three Studies for Figures at the Base of a Crucifixion, Francis Bacon

from wikipedia:

Three Studies for Figures at the Base of a Crucifixion is a 1944 triptych painted by the Irish-born artist Francis Bacon. The work is based on the Eumenides—or Furies—of Aeschylus' The Oresteia, and depicts three writhing anthropomorphic creatures set against a flat burnt orange background. The triptych summarises themes explored in Bacon's previous paintings, including his examination of Picasso's biomorphs and his interpretations of the Crucifixion and the Greek Furies. Bacon did not realise his original intention to paint a large crucifixion scene and place the figures at the foot of the cross.

The Three Studies triptych is generally considered Bacon's first mature piece; he regarded his works before the triptych as irrelevant, and throughout his life tried to suppress their appearance on the art market. When the painting was first exhibited in 1945, it caused a sensation, and helped to establish him as one of the foremost post-war painters. Commenting on the cultural significance of Three Studies, the critic John Russell observed in 1971 that "there was painting in England before the Three Studies, and painting after them, and no one ... can confuse the two."