I think the answer is diet. If not it's country of origin.
Answer: Here you go!
Explanation:
The Decline of Patronage The middle class provides a new market for musicians to sell their works, and leads to the creation of the public concert, works for amateurs and aficionados, and an increase in instructional treatises and instructors.
Hope this helps!
This piece of art would fall under the potrait category
Look at how this picture is similar to the one you are asking about.