Which painting shows soldiers busying themselves about their assigned duty of digging a post hole and raising the cross while various people look on and discuss the events ?
The relief treatment , in which some of the figures are boldly projecting , may indicate Michelangelo 's familiarity with Roman sarcophagus reliefs from the collection of Lorenzo Medici , and similar marble panels created by Nicola and Giovanni Pisano , and with the figurative compositions on Ghiberti 's Baptistry Doors .