Rokeby Venus as well as classical sculptures known to Velázquez, of which casts were made for Madrid. These were the "Sleeping Ariadne" now in the Pitti Palace, but then in Rome, of which Velázquez ordered a cast for the Royal collection in 1650–51, and the Borghese Hermaphroditus, a sleeping hermaphrodite (picture to the right above), now in the Louvre, of which a cast was sent to Madrid, and which also emphasises the curve from hip to waist. However, the combination of elements in Velázquez's composition was original. The "Rokeby Venus" may have been intended as a pendant to a sixteenth-century Venetian painting
Sleeping Venus (Giorgione) a sitting figure of Cupid beside Venus's feet, which was over-painted in the 19th century. In the course of painting, the landscape has also been changed at both sides, as has the colouring of the drapery, and the head of Venus was originally seen in profile, making it very similar to Titian's later "Pardo Venus". According to the usual account, the painting was unfinished at the time of Giorgione's death. The landscape and sky were later finished by Titian, who in 1534 painted the similar "Venus of Urbino", and several other reclining female nudes, such as his much repeated "Venus