Since the early ’80s, the Los Angeles-based artist Christopher Williams has adapted images from photographic archives, depicted objects in specialized collections, or taken pictures that involve no institutional sources. Although his procedures vary, Williams’ work always addresses a world of references, entailing active spectatorship as well as cognitive processes (it is telling that Williams studied not only with Michael Asher and John Baldessari, but also with Douglas Huebler at Cal Arts). His recent solo show featured five pieces from his ongoing series “For Example: Die Welt ist Schön” (