By the end of the eighteenth century, the attitude towards musicians had changed. Explain this change of attitude

Classical music used formality and emphasis on order and hierarchy, and a "clearer", "cleaner" style that used clearer divisions between parts (notably a clear, single melody accompanied by chords), brighter contrasts and "tone colors" (achieved by the use of dynamic changes and modulations to more keys).

the sculpture i am pretty sure you are talking about is the statue b. the david statue now lives in the galleria dell'accademia, florence, italy. it was made by ‎michelangelo.