Auction introduction: Sotheby’s Contemporary Day Auction is honored to present an extraordinary selection of works this November. Highlights include exceptional works from the boundary-defying Collection of Chara Schreyer and works from the iconic, historically resonant Collection of John Cheim. The Contemporary Day Auction will also feature exceptional examples by many of the most critically acclaimed artists of the 20th and 21st centuries, spanning Post-War Abstract Expressionism, Minimalism and Pop Art up to the most avant-garde works of today.