Rokeby Venus been cited as sources of inspiration for Velázquez. The nude Venuses of the Italian painters, such as Giorgione's "Sleeping Venus" (c. 1510) and Titian's "Venus of Urbino" (1538), were the main precedents. In this work, Velázquez combined two established poses for Venus: recumbent on a couch or a bed, and gazing at a mirror. She is often described as looking at herself on the mirror, although this is physically impossible since viewers can see her face reflected in their direction. This phenomenon is known as the Venus effect. In a number of ways the painting represents a pictorial departure, through
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