Original sentence: In sculpture, Donatello's (1386–1466) study of classical sculpture led to his development of classicizing positions (such as the contrapposto pose) and subject matter (like the unsupported nude – his second sculpture of David was the first free-standing bronze nude created in Europe since the Roman Empire
Edited sentence: Completed in 1460, the San Zeno Altarpiece of Andrea Mantegna, was probably the first good example of Renaissance painting in Northern Italy and became a model for other painters in the region.In sculpture, Donatello's (1386–1466)  study of classical sculpture led to his development of classicizing positions (such as the contrapposto pose) and subject matter (like the unsupported nude – his second sculpture of David was the first free-standing bronze nude created in Europe since the Roman Empire.This creation of a credible space allowed artists to also focus on the accurate representation of the human body and on naturalistic landscapes