In sculpture, the term “relief” refers to any work in which the figures project from a flat background. In alto-relievo, or high relief, the protrusion is great. Basso-relievo, or bas-relief, protrudes only slightly. Mezzo-relievo is intermediate between the two. Ancient Egyptian and Etruscan art also features cavo-relievo, literally “hollow relief,” in which the design is incised deeper than the background. What commonplace item found in many of our pockets features bas-relief? Discuss