Polyphonic: Celebrating PAMM’s Fund for African American Art highlights a group of paintings, sculptures, and photographs that have since become quintessential for the museum—including works by Terry Adkins, Romare Bearden, Kevin Beasley, Ed Clark, Leslie Hewitt, Faith Ringgold, Tschabalala Self, Xaviera Simmons and Juana Valdes, among several others.