Jessie T. Pettway, Bars and String-Pieced Columns, 1950s. An extraordinary collection of sixty-two works by African American artists from the Southern United States has joined the permanent collection of the Fine Arts Museums of San Francisco. This major acquisition is on view in Revelations: Art from the African American South at the de Young Museum. 500 interlocking pieces. Ages 8 and up. Measures 16 x 20 in completed.