 It is carved in shallow relief, a technique often employed by the master-sculptor of the early 15th century, Donatello, and others such as Desiderio da Settignano.While the Madonna is in profile, the easiest aspect for a shallow relief, the child displays a twisting motion that was to become characteristic of Michelangelo's work.The "Taddei Tondo" of 1502 shows the Christ Child frightened by a Bullfinch, a symbol of the Crucifixion.