They may not have even believed that the Black Death was even reality. This is because they are all used to living such lavish and rich lives, they would never thinking a having such a horrible diesease.
Sculpture that represents Renaissance's rebirth of Greek concepts and stylistic elements is David by Michelangelo. Stylistic elements that represent Classical influence are 1) theme of naked male hero and 2) contraposto pose (figure's hips and shoulders to rest at opposing angles and head is turned of to the left). The scultpure is also very detailed (including visible blood vessels). Focusing on men's naked body is a proof of Renaissance's interests in Classical philosophies and cultural heritage.
The two Donatello's characteristic formal contributions are encountered in the work for Baptistery of Siena. He demonstated it through organizing the relief by a rigorous application of the rules of perspective. Even though it was created at a shallow deptht, this technique makes each figure of a scene emerge clearly and very logically. This technique is determined as a flattened relief.