Johann Christian (Sebastian) Bach:
Born – Leipzig, Germany, 1735 ~ 1782

German composer of the Classical era and he is noted for playing a role in influencing the concerto styles of Haydn and Mozart. He contributed significantly to the development of the new sonata principle.

Masonic Lodge:
Lodge of Nine Muses No. 235, London.

Source:
https://freemasonry.bcy.ca/biography/bach_jc/bach_jc.html