New volume in the Frick Diptych series focuses on a remarkable Renaissance lamp, pairing an essay by Frick director Ian Wardropper with a new poem by James Fenton. The form of this extraordinary bronze lamp, the most elaborate of several produced by Riccio (Andrea Briosco), is based on a Roman sandal, and its surface is covered with intricate reliefs modelled with a goldsmith's refinement and crisp detail. The subjects evoke the populace...