Sleeping by the Lion Carpet, a masterpiece by Lucian Freud, the final work of the artist’s celebrated quartet of monumental portraits of benefits supervisor Sue Tilley, is at Sotheby’s in London on June 24 with an estimate of £25 million – £35 million (€28.89 million – €40.44 million). The four monumental canvases Freud painted of Tilley between 1993 and 1996 are widely regarded not only as the artist’s greatest body of work, but also among the most radical and powerful paintings of the human figure in the entire history of art. The last time a painting from the series came to auction it made history. When Benefits Supervisor Resting sold for $56.2 million (€48.24 million) in 2015 it was a record for Freud and any living artist. Sleeping by the Lion Carpet is from the Lewis Collection, assembled by former Tottenham Hotspur owner Joe Lewis and his daughter Vivienne. It promises to be the most valuable single collection ever offered in London.