CHICAGO — The Art Institute of Chicago has acquired 1,440 Dutch Mannerist prints from the Hearn Family Foundation and the Charles Hack collection. Ranging chronologically from the 1530s to about 1650, these prints chart the history of Dutch printmaking at the period of its greatest technical and artistic sophistication. The incomparable collection, assembled during three decades, reveals all the complexity and sophistication of Mannerist art, including a virtuosic command of printmaking, unusual perspectives and proportions, and eroticism coupled with a delight in allegory and humanism.