Francesco Guardis 'Venice, a view of the Rialto' @ Sotheby's London

LONDON.- Sothebys employee Maria Sheremeteva studies Francesco Guardis Venice, a view of the Rialto Bridge before it will be sold at auction on July 6, 2011, the painting estimated to fetch in the region of 20 million pounds, US$32.21 million. AP Photo/Joel Ryan.

LONDON.- Sothebys employee Maria Sheremeteva studies Francesco Guardis Venice, a view of the Rialto Bridge before it will be sold at auction on July 6, 2011, the painting is estimated to fetch in the region of 20 million pounds, US$32.21 million. AP Photo/Joel Ryan.

LONDON.- Sothebys technicians hold Guardis Venice, a view of the Rialto Bridge before it will be sold at auction on July 6, 2011, the painting estimated to fetch in the region of 20 million pounds, 32,21 million dollars. AP Photo/Joel Ryan.