Auction introduction: Christie’s upcoming Outsider Art auction features masterpieces by the category’s top artists as well as significant works by up-and-coming names in the field. The sale includes drawings and sculptures from iconic figures such as Henry Darger, Bill Traylor and Thornton Dial. Also featured are remarkable works by European artists such as Anna Zemankova and Sava Sekulic. Pieces by top American artists in the category, including Charles A. A. Dellschau, Eugene Von Bruenchenhein, David Butler, James Castle, Sam Doyle, William Hawkins, Clementine Hunter, Sister Gertrude Morgan, Nellie Mae Rowe, Minnie Evans and Joseph Yoakum round out this diverse and exciting sale.