New volume in the Frick Diptych series focuses on an enigmatic Renaissance portrait, pairing an essay by Frick curator Aimee Ng with a contribution by bestselling author Daniel Mendelsohn. Painted about 1550-50 by Agnolo Bronzino (Italian, 1503-1572), this remarkable portrait depicts the young Florentine aristocrat Lodovico Capponi (b. 1534), an associate of the Medici court. Capponi wears black and white, his family's armorial colors...