Auction introduction: Sotheby’s Paris' Art Contemporain Day Auction brings together remarkable works by some of the most celebrated artists of the past 80 years. Amongst the notable collections in the auction is an exceptional group of Post War historical works from the Maurice Solomon Collection including Pierre Soulages, Simon Hantai and Hartung. Other highlights of the sale include important works by, Ai Weiwei, Imi Knoebel, Ugo Rondinone, Raymond Pettibon and Bernard Frize.