Piazza San Marco, Venice

Piazza San Marco, Venice

Sotheby's via Bloomberg

"Piazza San Marco, Venice," by 18th century Italian painter Canaletto is shown in this handout photo released to the media on Oct. 1, 2013. It is one of two identically sized canvases by the artist that will be auctioned by Sotheby's in London on Dec. 4.