Where were two of Donatello's characteristic formal contributions encountered? How did he demonstrate these

Two of Donatello's characteristic formal contributions were encountered in the work for Baptistery of Siena. He demonstrated these contributions through his use of perspective and relief. By utilizing these elements, Donatello effectively created artwork that illustrated depth and perspective. Specifically, this technique was referred to as flattened relief.

Explanation:

just trust me

he played a solid-body guitar

explanation:

earliest

neumes above text

neumes

colored lines

neumes

4-line staff

f, c, or g clef

notes on 5-line staff with clef

mensuration (longas and breves)

time signature (perfect or half circle)

most recent

notes on 5-line staff

modern clefs

modern note values (whole, half, quarter, and so on)

modern time signature

italian words and abbreviations for dynamics and tempo

staccato, slurs, and so on