Sotheby's most valuable collection in Russia on show in Moscow Sotheby’s is holding a pre-auction exhibition held in Moscow on Thursday and Friday showing most expensive collection of artworks the auction house has ever previewed in Russia. The collection includes paintings from the Pre-Raphaelites Dante Gabriel Rossetti, William Holman Hunt and James Tissot, as well Pablo Picasso, Robert Falk, Alberto Giacometti and Canaletto. The works will go under the hammer in London in November. The move to take the works in Moscow ahead of the auction is testament to the growing financial clout and interest in art from Russian collectors. Images and soundbites.