Statue representing Autumn by Gian Lorenzo and Pietro Bernini, estimated at $8m-12m at Sotheby's.

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This ensemble, spanning Old Master paintings and sculpture through to Contemporary works of art, will be offered on January 29 with a further online only sale on January 22-29.

The collection’s highlight is an impressive Baroque marble statue of a bearded man representing Autumn executed c.1615-18 by the young Gian Lorenzo Bernini (1598-1680) and his father Pietro (1562-1629).

Made for Prince Leone Strozzi, one of the Berninis’ first patrons in Rome, it passed down through the Strozzi family until sometime in the 19th century. Diamond acquired the work in 1991 from Anthony Roth in London.

One of the few sculptures by Bernini and his father still in private hands, the 4ft 1in (1.25m) high marble has an estimate of $8m-12m.