This October, we examine one of the least known challenges facing museum directors: dealing with trustees. We talk to architect Renzo Piano about his past triumphs—among them the Pompidou Center in Paris—and his future projects, including museum buildings in Los Angeles, Chicago, and New York. We profile David Altmejd, whose sleeping giants, sexy werewolves, and life-size birdmen are rooted in classical sculpture—infused with a horror-film sensibility. We chronicle the career of Aaron Douglas, who forged a bold new vocabulary that helped define a black esthetic in the years before World War II and is now getting his first retrospective. And we look at the ways the Vatican is reaching out to contemporary artists.