Known as The Sleeping Ariadne, and also often identified as Cleopatra, this reclining figure was carved after the antique
prototype dating from the late Hadrianic period (itself a copy of a 2nd century BC Greek prototype) in the collection of The Musei Vaticani, Rome. The statue was first recorded in 1512 as having been acquired by Pope Julius II.
Francis Haskell and Nicholas Penny, Taste and the Antique, New Haven and London, 1981, no. 24, pp. 184-187