Haydn did more than any other composer to establish which genre?

String Quartet

Explanation:

Franz Joseph Haydn, an Austrian composer, came to be known for his contribution in string quartet genre. He wrote 68 string quartet.  He is considered to be the important and famous composers of the Classical period. A string quartet is composed of four string players two violin players along with a cellist player and a viola.  

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